Demo__

实现MyBatis Mapper XML文件增量动态刷新，自动加载，热加载，热部署

博客分类：

Java
MyBatis

最初启动服务后Mapper XML文件，必须重启服务才能生效，这样就大大影响了我们的开发效率。

网上同学们也有实现类似功能，但都是全部清空，全部刷新XML，这样硬件消耗比较严重，加载时间也比较长。我们只修改了几行SQL就没有必要全部加载，只需要加载修改的问题就行了。

后来为了急需解决这个问题，进行修改MyBatis源码实现Mapper XML增量刷新，直接覆盖方式实现，使用classloader的加载机制优先加载，并应用到了jeesite中，但是经过MyBatis几次升级后，不得不需要重新修改，部署也麻烦，入侵性太强。

周末有幸又重新研究下源代码将刷新部分，分离出来，实现MyBatis Mapper文件动态重新加载，只加载修改的文件，今天分享出来，不多说，看源码，注释很详细：

Java代码

/**
* Copyright (c) 2012-Now https://github.com/thinkgem/jeesite.
*/
package com.thinkgem.jeesite.mybatis.thread;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.session.Configuration;
import org.apache.log4j.Logger;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import com.google.common.collect.Sets;
/**
* 刷新MyBatis Mapper XML 线程
* @author ThinkGem
* @version 2016-5-29
*/
public class MapperRefresh implements java.lang.Runnable {
public static Logger log = Logger.getLogger(MapperRefresh.class);
private static String filename = "/mybatis-refresh.properties";
private static Properties prop = new Properties();
private static boolean enabled; // 是否启用Mapper刷新线程功能
private static boolean refresh; // 刷新启用后，是否启动了刷新线程
private Set location; // Mapper实际资源路径
private Resource[] mapperLocations; // Mapper资源路径
private Configuration configuration; // MyBatis配置对象
private Long beforeTime = 0L; // 上一次刷新时间
private static int delaySeconds; // 延迟刷新秒数
private static int sleepSeconds; // 休眠时间
private static String mappingPath; // xml文件夹匹配字符串，需要根据需要修改
static {
try {
prop.load(MapperRefresh.class.getResourceAsStream(filename));
} catch (Exception e) {
e.printStackTrace();
System.out.println("Load mybatis-refresh “"+filename+"” file error.");
}
enabled = "true".equalsIgnoreCase(getPropString("enabled"));
delaySeconds = getPropInt("delaySeconds");
sleepSeconds = getPropInt("sleepSeconds");
mappingPath = getPropString("mappingPath");
delaySeconds = delaySeconds == 0 ? 50 : delaySeconds;
sleepSeconds = sleepSeconds == 0 ? 3 : sleepSeconds;
mappingPath = StringUtils.isBlank(mappingPath) ? "mappings" : mappingPath;
log.debug("[enabled] " + enabled);
log.debug("[delaySeconds] " + delaySeconds);
log.debug("[sleepSeconds] " + sleepSeconds);
log.debug("[mappingPath] " + mappingPath);
}
public static boolean isRefresh() {
return refresh;
}
public MapperRefresh(Resource[] mapperLocations, Configuration configuration) {
this.mapperLocations = mapperLocations;
this.configuration = configuration;
}
@Override
public void run() {
beforeTime = System.currentTimeMillis();
log.debug("[location] " + location);
log.debug("[configuration] " + configuration);
if (enabled) {
// 启动刷新线程
final MapperRefresh runnable = this;
new Thread(new java.lang.Runnable() {
@Override
public void run() {
if (location == null){
location = Sets.newHashSet();
log.debug("MapperLocation's length:" + mapperLocations.length);
for (Resource mapperLocation : mapperLocations) {
String s = mapperLocation.toString().replaceAll("\\\\", "/");
s = s.substring("file [".length(), s.lastIndexOf(mappingPath) + mappingPath.length());
if (!location.contains(s)) {
location.add(s);
log.debug("Location:" + s);
}
}
log.debug("Locarion's size:" + location.size());
}
try {
Thread.sleep(delaySeconds * 1000);
} catch (InterruptedException e2) {
e2.printStackTrace();
}
refresh = true;
System.out.println("========= Enabled refresh mybatis mapper =========");
while (true) {
try {
for (String s : location) {
runnable.refresh(s, beforeTime);
}
} catch (Exception e1) {
e1.printStackTrace();
}
try {
Thread.sleep(sleepSeconds * 1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}, "MyBatis-Mapper-Refresh").start();
}
}
/**
* 执行刷新
* @param filePath 刷新目录
* @param beforeTime 上次刷新时间
* @throws NestedIOException 解析异常
* @throws FileNotFoundException 文件未找到
* @author ThinkGem
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
private void refresh(String filePath, Long beforeTime) throws Exception {
// 本次刷新时间
Long refrehTime = System.currentTimeMillis();
// 获取需要刷新的Mapper文件列表
List fileList = this.getRefreshFile(new File(filePath), beforeTime);
if (fileList.size() > 0) {
log.debug("Refresh file: " + fileList.size());
}
for (int i = 0; i < fileList.size(); i++) {
InputStream inputStream = new FileInputStream(fileList.get(i));
String resource = fileList.get(i).getAbsolutePath();
try {
// 清理原有资源，更新为自己的StrictMap方便，增量重新加载
String[] mapFieldNames = new String[]{
"mappedStatements", "caches",
"resultMaps", "parameterMaps",
"keyGenerators", "sqlFragments"
};
for (String fieldName : mapFieldNames){
Field field = configuration.getClass().getDeclaredField(fieldName);
field.setAccessible(true);
Map map = ((Map)field.get(configuration));
if (!(map instanceof StrictMap)){
Map newMap = new StrictMap(StringUtils.capitalize(fieldName) + "collection");
for (Object key : map.keySet()){
try {
newMap.put(key, map.get(key));
}catch(IllegalArgumentException ex){
newMap.put(key, ex.getMessage());
}
}
field.set(configuration, newMap);
}
}
// 清理已加载的资源标识，方便让它重新加载。
Field loadedResourcesField = configuration.getClass().getDeclaredField("loadedResources");
loadedResourcesField.setAccessible(true);
Set loadedResourcesSet = ((Set)loadedResourcesField.get(configuration));
loadedResourcesSet.remove(resource);
//重新编译加载资源文件。
XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(inputStream, configuration,
resource, configuration.getSqlFragments());
xmlMapperBuilder.parse();
} catch (Exception e) {
throw new NestedIOException("Failed to parse mapping resource: '" + resource + "'", e);
} finally {
ErrorContext.instance().reset();
}
System.out.println("Refresh file: " + mappingPath + StringUtils.substringAfterLast(fileList.get(i).getAbsolutePath(), mappingPath));
if (log.isDebugEnabled()) {
log.debug("Refresh file: " + fileList.get(i).getAbsolutePath());
log.debug("Refresh filename: " + fileList.get(i).getName());
}
}
// 如果刷新了文件，则修改刷新时间，否则不修改
if (fileList.size() > 0) {
this.beforeTime = refrehTime;
}
}
/**
* 获取需要刷新的文件列表
* @param dir 目录
* @param beforeTime 上次刷新时间
* @return 刷新文件列表
*/
private List getRefreshFile(File dir, Long beforeTime) {
List fileList = new ArrayList();
File[] files = dir.listFiles();
if (files != null) {
for (int i = 0; i < files.length; i++) {
File file = files[i];
if (file.isDirectory()) {
fileList.addAll(this.getRefreshFile(file, beforeTime));
} else if (file.isFile()) {
if (this.checkFile(file, beforeTime)) {
fileList.add(file);
}
} else {
System.out.println("Error file." + file.getName());
}
}
}
return fileList;
}
/**
* 判断文件是否需要刷新
* @param file 文件
* @param beforeTime 上次刷新时间
* @return 需要刷新返回true，否则返回false
*/
private boolean checkFile(File file, Long beforeTime) {
if (file.lastModified() > beforeTime) {
return true;
}
return false;
}
/**
* 获取整数属性
* @param key
* @return
*/
private static int getPropInt(String key) {
int i = 0;
try {
i = Integer.parseInt(getPropString(key));
} catch (Exception e) {
}
return i;
}
/**
* 获取字符串属性
* @param key
* @return
*/
private static String getPropString(String key) {
return prop == null ? null : prop.getProperty(key);
}
/**
* 重写 org.apache.ibatis.session.Configuration.StrictMap 类
* 来自 MyBatis3.4.0版本，修改 put 方法，允许反复 put更新。
*/
public static class StrictMap extends HashMap {
private static final long serialVersionUID = -4950446264854982944L;
private String name;
public StrictMap(String name, int initialCapacity, float loadFactor) {
super(initialCapacity, loadFactor);
this.name = name;
}
public StrictMap(String name, int initialCapacity) {
super(initialCapacity);
this.name = name;
}
public StrictMap(String name) {
super();
this.name = name;
}
public StrictMap(String name, Mapextends V> m) {
super(m);
this.name = name;
}
@SuppressWarnings("unchecked")
public V put(String key, V value) {
// ThinkGem 如果现在状态为刷新，则刷新(先删除后添加)
if (MapperRefresh.isRefresh()) {
remove(key);
MapperRefresh.log.debug("refresh key:" + key.substring(key.lastIndexOf(".") + 1));
}
// ThinkGem end
if (containsKey(key)) {
throw new IllegalArgumentException(name + " already contains value for " + key);
}
if (key.contains(".")) {
final String shortKey = getShortName(key);
if (super.get(shortKey) == null) {
super.put(shortKey, value);
} else {
super.put(shortKey, (V) new Ambiguity(shortKey));
}
}
return super.put(key, value);
}
public V get(Object key) {
V value = super.get(key);
if (value == null) {
throw new IllegalArgumentException(name + " does not contain value for " + key);
}
if (value instanceof Ambiguity) {
throw new IllegalArgumentException(((Ambiguity) value).getSubject() + " is ambiguous in " + name
+ " (try using the full name including the namespace, or rename one of the entries)");
}
return value;
}
private String getShortName(String key) {
final String[] keyparts = key.split("\\.");
return keyparts[keyparts.length - 1];
}
protected static class Ambiguity {
private String subject;
public Ambiguity(String subject) {
this.subject = subject;
}
public String getSubject() {
return subject;
}
}
}
}

/**
 * Copyright (c) 2012-Now https://github.com/thinkgem/jeesite.
 */
package com.thinkgem.jeesite.mybatis.thread;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.session.Configuration;
import org.apache.log4j.Logger;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;

import com.google.common.collect.Sets;

/**

刷新MyBatis Mapper XML 线程
@author ThinkGem
@version 2016-5-29
*/
public class MapperRefresh implements java.lang.Runnable {

public static Logger log = Logger.getLogger(MapperRefresh.class);

private static String filename = “/mybatis-refresh.properties”;
private static Properties prop = new Properties();

private static boolean enabled; // 是否启用Mapper刷新线程功能
private static boolean refresh; // 刷新启用后，是否启动了刷新线程

private Set location; // Mapper实际资源路径

private Resource[] mapperLocations; // Mapper资源路径
private Configuration configuration; // MyBatis配置对象

private Long beforeTime = 0L; // 上一次刷新时间
private static int delaySeconds; // 延迟刷新秒数
private static int sleepSeconds; // 休眠时间
private static String mappingPath; // xml文件夹匹配字符串，需要根据需要修改

static {
```
 try {
 	prop.load(MapperRefresh.class.getResourceAsStream(filename));
 } catch (Exception e) {
 	e.printStackTrace();
 	System.out.println("Load mybatis-refresh “"+filename+"” file error.");
 }

 enabled = "true".equalsIgnoreCase(getPropString("enabled"));
 
 delaySeconds = getPropInt("delaySeconds");
 sleepSeconds = getPropInt("sleepSeconds");
 mappingPath = getPropString("mappingPath");

 delaySeconds = delaySeconds == 0 ? 50 : delaySeconds;
 sleepSeconds = sleepSeconds == 0 ? 3 : sleepSeconds;
 mappingPath = StringUtils.isBlank(mappingPath) ? "mappings" : mappingPath;

 log.debug("[enabled] " + enabled);
 log.debug("[delaySeconds] " + delaySeconds);
 log.debug("[sleepSeconds] " + sleepSeconds);
 log.debug("[mappingPath] " + mappingPath);
```
}

public static boolean isRefresh() {
return refresh;
}

public MapperRefresh(Resource[] mapperLocations, Configuration configuration) {
this.mapperLocations = mapperLocations;
this.configuration = configuration;
}

@Override
public void run() {
```
 beforeTime = System.currentTimeMillis();

 log.debug("[location] " + location);
 log.debug("[configuration] " + configuration);

 if (enabled) {
 	// 启动刷新线程
 	final MapperRefresh runnable = this;
 	new Thread(new java.lang.Runnable() {
 		@Override
 		public void run() {
 			
 			if (location == null){
 				location = Sets.newHashSet();
 				log.debug("MapperLocation's length:" + mapperLocations.length);
 				for (Resource mapperLocation : mapperLocations) {
 					String s = mapperLocation.toString().replaceAll("\\\\", "/");
 					s = s.substring("file [".length(), s.lastIndexOf(mappingPath) + mappingPath.length());
 					if (!location.contains(s)) {
 						location.add(s);
 						log.debug("Location:" + s);
 					}
 				}
 				log.debug("Locarion's size:" + location.size());
 			}

 			try {
 				Thread.sleep(delaySeconds * 1000);
 			} catch (InterruptedException e2) {
 				e2.printStackTrace();
 			}
 			refresh = true;

 			System.out.println("========= Enabled refresh mybatis mapper =========");

 			while (true) {
 				try {
 					for (String s : location) {
 						runnable.refresh(s, beforeTime);
 					}
 				} catch (Exception e1) {
 					e1.printStackTrace();
 				}
 				try {
 					Thread.sleep(sleepSeconds * 1000);
 				} catch (InterruptedException e) {
 					e.printStackTrace();
 				}

 			}
 		}
 	}, "MyBatis-Mapper-Refresh").start();
 }
```
}

/**
- 执行刷新
- @param filePath 刷新目录
- @param beforeTime 上次刷新时间
- @throws NestedIOException 解析异常
- @throws FileNotFoundException 文件未找到
- @author ThinkGem
  */
  @SuppressWarnings({ “rawtypes”, “unchecked” })
  private void refresh(String filePath, Long beforeTime) throws Exception {
  
  // 本次刷新时间
  Long refrehTime = System.currentTimeMillis();
  
  // 获取需要刷新的Mapper文件列表
  List fileList = this.getRefreshFile(new File(filePath), beforeTime);
  if (fileList.size() > 0) {
  log.debug("Refresh file: " + fileList.size());
  }
  for (int i = 0; i < fileList.size(); i++) {
  InputStream inputStream = new FileInputStream(fileList.get(i));
  String resource = fileList.get(i).getAbsolutePath();
  try {
```
 	// 清理原有资源，更新为自己的StrictMap方便，增量重新加载
 	String[] mapFieldNames = new String[]{
 		"mappedStatements", "caches",
 		"resultMaps", "parameterMaps",
 		"keyGenerators", "sqlFragments"
 	};
 	for (String fieldName : mapFieldNames){
 		Field field = configuration.getClass().getDeclaredField(fieldName);
 		field.setAccessible(true);
 		Map map = ((Map)field.get(configuration));
 		if (!(map instanceof StrictMap)){
 			Map newMap = new StrictMap(StringUtils.capitalize(fieldName) + "collection");
 			for (Object key : map.keySet()){
 				try {
 					newMap.put(key, map.get(key));
 				}catch(IllegalArgumentException ex){
 					newMap.put(key, ex.getMessage());
 				}
 			}
 			field.set(configuration, newMap);
 		}
 	}
 	
 	// 清理已加载的资源标识，方便让它重新加载。
 	Field loadedResourcesField = configuration.getClass().getDeclaredField("loadedResources");
 	loadedResourcesField.setAccessible(true);
 	Set loadedResourcesSet = ((Set)loadedResourcesField.get(configuration));
 	loadedResourcesSet.remove(resource);
 	
 	//重新编译加载资源文件。
 	XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(inputStream, configuration, 
 			resource, configuration.getSqlFragments());
 	xmlMapperBuilder.parse();
 } catch (Exception e) {
 	throw new NestedIOException("Failed to parse mapping resource: '" + resource + "'", e);
 } finally {
 	ErrorContext.instance().reset();
 }
 System.out.println("Refresh file: " + mappingPath + StringUtils.substringAfterLast(fileList.get(i).getAbsolutePath(), mappingPath));
 if (log.isDebugEnabled()) {
 	log.debug("Refresh file: " + fileList.get(i).getAbsolutePath());
 	log.debug("Refresh filename: " + fileList.get(i).getName());
 }
```
  }
  // 如果刷新了文件，则修改刷新时间，否则不修改
  if (fileList.size() > 0) {
  this.beforeTime = refrehTime;
  }
  }
/**
- 获取需要刷新的文件列表
- @param dir 目录
- @param beforeTime 上次刷新时间
- @return 刷新文件列表
  */
  private List getRefreshFile(File dir, Long beforeTime) {
  List fileList = new ArrayList();
  
  File[] files = dir.listFiles();
  if (files != null) {
  for (int i = 0; i < files.length; i++) {
  File file = files[i];
  if (file.isDirectory()) {
  fileList.addAll(this.getRefreshFile(file, beforeTime));
  } else if (file.isFile()) {
  if (this.checkFile(file, beforeTime)) {
  fileList.add(file);
  }
  } else {
  System.out.println(“Error file.” + file.getName());
  }
  }
  }
  return fileList;
  }
/**
- 判断文件是否需要刷新
- @param file 文件
- @param beforeTime 上次刷新时间
- @return 需要刷新返回true，否则返回false
  */
  private boolean checkFile(File file, Long beforeTime) {
  if (file.lastModified() > beforeTime) {
  return true;
  }
  return false;
  }
/**
- 获取整数属性
- @param key
- @return
  */
  private static int getPropInt(String key) {
  int i = 0;
  try {
  i = Integer.parseInt(getPropString(key));
  } catch (Exception e) {
  }
  return i;
  }
/**
- 获取字符串属性
- @param key
- @return
  */
  private static String getPropString(String key) {
  return prop == null ? null : prop.getProperty(key);
  }
/**
- 重写 org.apache.ibatis.session.Configuration.StrictMap 类
- 来自 MyBatis3.4.0版本，修改 put 方法，允许反复 put更新。
  */
  public static class StrictMap extends HashMap {
  
  private static final long serialVersionUID = -4950446264854982944L;
  private String name;
  
  public StrictMap(String name, int initialCapacity, float loadFactor) {
  super(initialCapacity, loadFactor);
  this.name = name;
  }
  
  public StrictMap(String name, int initialCapacity) {
  super(initialCapacity);
  this.name = name;
  }
  
  public StrictMap(String name) {
  super();
  this.name = name;
  }
  
  public StrictMap(String name, Map m) {
  super(m);
  this.name = name;
  }
  
  @SuppressWarnings(“unchecked”)
  public V put(String key, V value) {
  // ThinkGem 如果现在状态为刷新，则刷新(先删除后添加)
  if (MapperRefresh.isRefresh()) {
  remove(key);
  MapperRefresh.log.debug(“refresh key:” + key.substring(key.lastIndexOf(".") + 1));
  }
  // ThinkGem end
  if (containsKey(key)) {
  throw new IllegalArgumentException(name + " already contains value for " + key);
  }
  if (key.contains(".")) {
  final String shortKey = getShortName(key);
  if (super.get(shortKey) == null) {
  super.put(shortKey, value);
  } else {
  super.put(shortKey, (V) new Ambiguity(shortKey));
  }
  }
  return super.put(key, value);
  }
  
  public V get(Object key) {
  V value = super.get(key);
  if (value == null) {
  throw new IllegalArgumentException(name + " does not contain value for " + key);
  }
  if (value instanceof Ambiguity) {
  throw new IllegalArgumentException(((Ambiguity) value).getSubject() + " is ambiguous in " + name
  + " (try using the full name including the namespace, or rename one of the entries)");
  }
  return value;
  }
  
  private String getShortName(String key) {
  final String[] keyparts = key.split("\.");
  return keyparts[keyparts.length - 1];
  }
  
  protected static class Ambiguity {
  private String subject;
```
 public Ambiguity(String subject) {
 	this.subject = subject;
 }

 public String getSubject() {
 	return subject;
 }
```
  }
  }
  }

MyBatis有几个不太好的地方，是当实体类别名重名的时候，Mapper XML有错误的时候，系统启动时会一直等待无法正常启动（其实是加载失败后又重新加载，进入了死循环），这里我也顺便重写下SqlSessionFactoryBean.java文件，解决这个问题，在这个文件里也加入启动上面写的线程类：

1、修改实体类重名的时候抛出并打印异常，否则系统会一直递归造成无法启动。

2、MapperXML有错误的时候抛出并打印异常，否则系统会一直递归造成无法启动。

3、加入启动MapperRefresh.java线程服务。

Java代码

/**
* Copyright 2010-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.thinkgem.jeesite.mybatis.spring;
import static org.springframework.util.Assert.notNull;
import static org.springframework.util.ObjectUtils.isEmpty;
import static org.springframework.util.StringUtils.hasLength;
import static org.springframework.util.StringUtils.tokenizeToStringArray;
import java.io.IOException;
import java.sql.SQLException;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.ibatis.builder.xml.XMLConfigBuilder;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.type.TypeHandler;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
import com.thinkgem.jeesite.common.mybatis.thread.MapperRefresh;
/**
* {@code FactoryBean} that creates an MyBatis {@code SqlSessionFactory}.
* This is the usual way to set up a shared MyBatis {@code SqlSessionFactory} in a Spring application context;
* the SqlSessionFactory can then be passed to MyBatis-based DAOs via dependency injection.
*
* Either {@code DataSourceTransactionManager} or {@code JtaTransactionManager} can be used for transaction
* demarcation in combination with a {@code SqlSessionFactory}. JTA should be used for transactions
* which span multiple databases or when container managed transactions (CMT) are being used.
*
* @author Putthibong Boonbong
* @author Hunter Presnall
* @author Eduardo Macarron
*
* @see #setConfigLocation
* @see #setDataSource
* @version $Id$
* @modify ThinkGem 2016-5-24 来自 MyBatisSpring1.2.3版本
*/
public class SqlSessionFactoryBean implements FactoryBean, InitializingBean, ApplicationListener {
private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);
private Resource configLocation;
private Resource[] mapperLocations;
private DataSource dataSource;
private TransactionFactory transactionFactory;
private Properties configurationProperties;
private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
private SqlSessionFactory sqlSessionFactory;
//EnvironmentAware requires spring 3.1
private String environment = SqlSessionFactoryBean.class.getSimpleName();
private boolean failFast;
private Interceptor[] plugins;
private TypeHandler[] typeHandlers;
private String typeHandlersPackage;
private Class[] typeAliases;
private String typeAliasesPackage;
private Class typeAliasesSuperType;
//issue #19. No default provider.
private DatabaseIdProvider databaseIdProvider;
private ObjectFactory objectFactory;
private ObjectWrapperFactory objectWrapperFactory;
/**
* Sets the ObjectFactory.
*
* @since 1.1.2
* @param objectFactory
*/
public void setObjectFactory(ObjectFactory objectFactory) {
this.objectFactory = objectFactory;
}
/**
* Sets the ObjectWrapperFactory.
*
* @since 1.1.2
* @param objectWrapperFactory
*/
public void setObjectWrapperFactory(ObjectWrapperFactory objectWrapperFactory) {
this.objectWrapperFactory = objectWrapperFactory;
}
/**
* Gets the DatabaseIdProvider
*
* @since 1.1.0
* @return
*/
public DatabaseIdProvider getDatabaseIdProvider() {
return databaseIdProvider;
}
/**
* Sets the DatabaseIdProvider.
* As of version 1.2.2 this variable is not initialized by default.
*
* @since 1.1.0
* @param databaseIdProvider
*/
public void setDatabaseIdProvider(DatabaseIdProvider databaseIdProvider) {
this.databaseIdProvider = databaseIdProvider;
}
/**
* Mybatis plugin list.
*
* @since 1.0.1
*
* @param plugins list of plugins
*
*/
public void setPlugins(Interceptor[] plugins) {
this.plugins = plugins;
}
/**
* Packages to search for type aliases.
*
* @since 1.0.1
*
* @param typeAliasesPackage package to scan for domain objects
*
*/
public void setTypeAliasesPackage(String typeAliasesPackage) {
this.typeAliasesPackage = typeAliasesPackage;
}
/**
* Super class which domain objects have to extend to have a type alias created.
* No effect if there is no package to scan configured.
*
* @since 1.1.2
*
* @param typeAliasesSuperType super class for domain objects
*
*/
public void setTypeAliasesSuperType(Class typeAliasesSuperType) {
this.typeAliasesSuperType = typeAliasesSuperType;
}
/**
* Packages to search for type handlers.
*
* @since 1.0.1
*
* @param typeHandlersPackage package to scan for type handlers
*
*/
public void setTypeHandlersPackage(String typeHandlersPackage) {
this.typeHandlersPackage = typeHandlersPackage;
}
/**
* Set type handlers. They must be annotated with {@code MappedTypes} and optionally with {@code MappedJdbcTypes}
*
* @since 1.0.1
*
* @param typeHandlers Type handler list
*/
public void setTypeHandlers(TypeHandler[] typeHandlers) {
this.typeHandlers = typeHandlers;
}
/**
* List of type aliases to register. They can be annotated with {@code Alias}
*
* @since 1.0.1
*
* @param typeAliases Type aliases list
*/
public void setTypeAliases(Class[] typeAliases) {
this.typeAliases = typeAliases;
}
/**
* If true, a final check is done on Configuration to assure that all mapped
* statements are fully loaded and there is no one still pending to resolve
* includes. Defaults to false.
*
* @since 1.0.1
*
* @param failFast enable failFast
*/
public void setFailFast(boolean failFast) {
this.failFast = failFast;
}
/**
* Set the location of the MyBatis {@code SqlSessionFactory} config file. A typical value is
* "WEB-INF/mybatis-configuration.xml".
*/
public void setConfigLocation(Resource configLocation) {
this.configLocation = configLocation;
}
/**
* Set locations of MyBatis mapper files that are going to be merged into the {@code SqlSessionFactory}
* configuration at runtime.
*
* This is an alternative to specifying "<sqlmapper>" entries in an MyBatis config file.
* This property being based on Spring's resource abstraction also allows for specifying
* resource patterns here: e.g. "classpath*:sqlmap/*-mapper.xml".
*/
public void setMapperLocations(Resource[] mapperLocations) {
this.mapperLocations = mapperLocations;
}
/**
* Set optional properties to be passed into the SqlSession configuration, as alternative to a
* {@code <properties>} tag in the configuration xml file. This will be used to
* resolve placeholders in the config file.
*/
public void setConfigurationProperties(Properties sqlSessionFactoryProperties) {
this.configurationProperties = sqlSessionFactoryProperties;
}
/**
* Set the JDBC {@code DataSource} that this instance should manage transactions for. The {@code DataSource}
* should match the one used by the {@code SqlSessionFactory}: for example, you could specify the same
* JNDI DataSource for both.
*
* A transactional JDBC {@code Connection} for this {@code DataSource} will be provided to application code
* accessing this {@code DataSource} directly via {@code DataSourceUtils} or {@code DataSourceTransactionManager}.
*
* The {@code DataSource} specified here should be the target {@code DataSource} to manage transactions for, not
* a {@code TransactionAwareDataSourceProxy}. Only data access code may work with
* {@code TransactionAwareDataSourceProxy}, while the transaction manager needs to work on the
* underlying target {@code DataSource}. If there's nevertheless a {@code TransactionAwareDataSourceProxy}
* passed in, it will be unwrapped to extract its target {@code DataSource}.
*
*/
public void setDataSource(DataSource dataSource) {
if (dataSource instanceof TransactionAwareDataSourceProxy) {
// If we got a TransactionAwareDataSourceProxy, we need to perform
// transactions for its underlying target DataSource, else data
// access code won't see properly exposed transactions (i.e.
// transactions for the target DataSource).
this.dataSource = ((TransactionAwareDataSourceProxy) dataSource).getTargetDataSource();
} else {
this.dataSource = dataSource;
}
}
/**
* Sets the {@code SqlSessionFactoryBuilder} to use when creating the {@code SqlSessionFactory}.
*
* This is mainly meant for testing so that mock SqlSessionFactory classes can be injected. By
* default, {@code SqlSessionFactoryBuilder} creates {@code DefaultSqlSessionFactory} instances.
*
*/
public void setSqlSessionFactoryBuilder(SqlSessionFactoryBuilder sqlSessionFactoryBuilder) {
this.sqlSessionFactoryBuilder = sqlSessionFactoryBuilder;
}
/**
* Set the MyBatis TransactionFactory to use. Default is {@code SpringManagedTransactionFactory}
*
* The default {@code SpringManagedTransactionFactory} should be appropriate for all cases:
* be it Spring transaction management, EJB CMT or plain JTA. If there is no active transaction,
* SqlSession operations will execute SQL statements non-transactionally.
*
* It is strongly recommended to use the default {@code TransactionFactory}. If not used, any
* attempt at getting an SqlSession through Spring's MyBatis framework will throw an exception if
* a transaction is active.
*
* @see SpringManagedTransactionFactory
* @param transactionFactory the MyBatis TransactionFactory
*/
public void setTransactionFactory(TransactionFactory transactionFactory) {
this.transactionFactory = transactionFactory;
}
/**
* NOTE: This class overrides any {@code Environment} you have set in the MyBatis
* config file. This is used only as a placeholder name. The default value is
* {@code SqlSessionFactoryBean.class.getSimpleName()}.
*
* @param environment the environment name
*/
public void setEnvironment(String environment) {
this.environment = environment;
}
/**
* {@inheritDoc}
*/
@Override
public void afterPropertiesSet() throws Exception {
notNull(dataSource, "Property 'dataSource' is required");
notNull(sqlSessionFactoryBuilder, "Property 'sqlSessionFactoryBuilder' is required");
this.sqlSessionFactory = buildSqlSessionFactory();
}
/**
* Build a {@code SqlSessionFactory} instance.
*
* The default implementation uses the standard MyBatis {@code XMLConfigBuilder} API to build a
* {@code SqlSessionFactory} instance based on an Reader.
*
* @return SqlSessionFactory
* @throws IOException if loading the config file failed
*/
protected SqlSessionFactory buildSqlSessionFactory() throws IOException {
Configuration configuration;
XMLConfigBuilder xmlConfigBuilder = null;
if (this.configLocation != null) {
xmlConfigBuilder = new XMLConfigBuilder(this.configLocation.getInputStream(), null, this.configurationProperties);
configuration = xmlConfigBuilder.getConfiguration();
} else {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Property 'configLocation' not specified, using default MyBatis Configuration");
}
configuration = new Configuration();
configuration.setVariables(this.configurationProperties);
}
if (this.objectFactory != null) {
configuration.setObjectFactory(this.objectFactory);
}
if (this.objectWrapperFactory != null) {
configuration.setObjectWrapperFactory(this.objectWrapperFactory);
}
if (hasLength(this.typeAliasesPackage)) {
String[] typeAliasPackageArray = tokenizeToStringArray(this.typeAliasesPackage,
ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
for (String packageToScan : typeAliasPackageArray) {
// ThinkGem 修改实体类重名的时候抛出并打印异常，否则系统会一直递归造成无法启动
try {
configuration.getTypeAliasRegistry().registerAliases(packageToScan,
typeAliasesSuperType == null ? Object.class : typeAliasesSuperType);
} catch (Exception ex) {
LOGGER.error("Scanned package: '" + packageToScan + "' for aliases", ex);
throw new NestedIOException("Scanned package: '" + packageToScan + "' for aliases", ex);
} finally {
ErrorContext.instance().reset();
}
// ThinkGem end
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Scanned package: '" + packageToScan + "' for aliases");
}
}
}
if (!isEmpty(this.typeAliases)) {
for (Class typeAlias : this.typeAliases) {
configuration.getTypeAliasRegistry().registerAlias(typeAlias);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Registered type alias: '" + typeAlias + "'");
}
}
}
if (!isEmpty(this.plugins)) {
for (Interceptor plugin : this.plugins) {
configuration.addInterceptor(plugin);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Registered plugin: '" + plugin + "'");
}
}
}
if (hasLength(this.typeHandlersPackage)) {
String[] typeHandlersPackageArray = tokenizeToStringArray(this.typeHandlersPackage,
ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
for (String packageToScan : typeHandlersPackageArray) {
configuration.getTypeHandlerRegistry().register(packageToScan);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Scanned package: '" + packageToScan + "' for type handlers");
}
}
}
if (!isEmpty(this.typeHandlers)) {
for (TypeHandler typeHandler : this.typeHandlers) {
configuration.getTypeHandlerRegistry().register(typeHandler);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Registered type handler: '" + typeHandler + "'");
}
}
}
if (xmlConfigBuilder != null) {
try {
xmlConfigBuilder.parse();
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Parsed configuration file: '" + this.configLocation + "'");
}
} catch (Exception ex) {
throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex);
} finally {
ErrorContext.instance().reset();
}
}
if (this.transactionFactory == null) {
this.transactionFactory = new SpringManagedTransactionFactory();
}
configuration.setEnvironment(new Environment(this.environment, this.transactionFactory, this.dataSource));
if (this.databaseIdProvider != null) {
try {
configuration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));
} catch (SQLException e) {
throw new NestedIOException("Failed getting a databaseId", e);
}
}
if (!isEmpty(this.mapperLocations)) {
for (Resource mapperLocation : this.mapperLocations) {
if (mapperLocation == null) {
continue;
}
try {
XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(mapperLocation.getInputStream(),
configuration, mapperLocation.toString(), configuration.getSqlFragments());
xmlMapperBuilder.parse();
} catch (Exception e) {
// ThinkGem MapperXML有错误的时候抛出并打印异常，否则系统会一直递归造成无法启动
LOGGER.error("Failed to parse mapping resource: '" + mapperLocation + "'", e);
throw new NestedIOException("Failed to parse mapping resource: '" + mapperLocation + "'", e);
} finally {
ErrorContext.instance().reset();
}
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Parsed mapper file: '" + mapperLocation + "'");
}
}
// ThinkGem 启动刷新MapperXML定时器（有助于开发者调试）。
new MapperRefresh(this.mapperLocations, configuration).run();
} else {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Property 'mapperLocations' was not specified or no matching resources found");
}
}
return this.sqlSessionFactoryBuilder.build(configuration);
}
/**
* {@inheritDoc}
*/
@Override
public SqlSessionFactory getObject() throws Exception {
if (this.sqlSessionFactory == null) {
afterPropertiesSet();
}
return this.sqlSessionFactory;
}
/**
* {@inheritDoc}
*/
@Override
public Classextends SqlSessionFactory> getObjectType() {
return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();
}
/**
* {@inheritDoc}
*/
@Override
public boolean isSingleton() {
return true;
}
/**
* {@inheritDoc}
*/
@Override
public void onApplicationEvent(ApplicationEvent event) {
if (failFast && event instanceof ContextRefreshedEvent) {
// fail-fast -> check all statements are completed
this.sqlSessionFactory.getConfiguration().getMappedStatementNames();
}
}
}

/**
 *    Copyright 2010-2015 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package com.thinkgem.jeesite.mybatis.spring;

import static org.springframework.util.Assert.notNull;
import static org.springframework.util.ObjectUtils.isEmpty;
import static org.springframework.util.StringUtils.hasLength;
import static org.springframework.util.StringUtils.tokenizeToStringArray;

import java.io.IOException;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.ibatis.builder.xml.XMLConfigBuilder;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.type.TypeHandler;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;

import com.thinkgem.jeesite.common.mybatis.thread.MapperRefresh;

/**

{@code FactoryBean} that creates an MyBatis {@code SqlSessionFactory}.
This is the usual way to set up a shared MyBatis {@code SqlSessionFactory} in a Spring application context;
the SqlSessionFactory can then be passed to MyBatis-based DAOs via dependency injection.
Either {@code DataSourceTransactionManager} or {@code JtaTransactionManager} can be used for transaction
demarcation in combination with a {@code SqlSessionFactory}. JTA should be used for transactions
which span multiple databases or when container managed transactions (CMT) are being used.
@author Putthibong Boonbong
@author Hunter Presnall
@author Eduardo Macarron
@see #setConfigLocation
@see #setDataSource
@version $I d$
@modify ThinkGem 2016-5-24 来自 MyBatisSpring1.2.3版本
*/
public class SqlSessionFactoryBean implements FactoryBean, InitializingBean, ApplicationListener {

private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);

private Resource configLocation;

private Resource[] mapperLocations;

private DataSource dataSource;

private TransactionFactory transactionFactory;

private Properties configurationProperties;

private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();

private SqlSessionFactory sqlSessionFactory;

//EnvironmentAware requires spring 3.1
private String environment = SqlSessionFactoryBean.class.getSimpleName();

private boolean failFast;

private Interceptor[] plugins;

private TypeHandler[] typeHandlers;

private String typeHandlersPackage;

private Class[] typeAliases;

private String typeAliasesPackage;

private Class typeAliasesSuperType;

//issue #19. No default provider.
private DatabaseIdProvider databaseIdProvider;

private ObjectFactory objectFactory;

private ObjectWrapperFactory objectWrapperFactory;

/**

Sets the ObjectFactory.
@since 1.1.2
@param objectFactory
*/
public void setObjectFactory(ObjectFactory objectFactory) {
this.objectFactory = objectFactory;
}

/**

Sets the ObjectWrapperFactory.
@since 1.1.2
@param objectWrapperFactory
*/
public void setObjectWrapperFactory(ObjectWrapperFactory objectWrapperFactory) {
this.objectWrapperFactory = objectWrapperFactory;
}

/**

Gets the DatabaseIdProvider
@since 1.1.0
@return
*/
public DatabaseIdProvider getDatabaseIdProvider() {
return databaseIdProvider;
}

/**

Sets the DatabaseIdProvider.
As of version 1.2.2 this variable is not initialized by default.
@since 1.1.0
@param databaseIdProvider
*/
public void setDatabaseIdProvider(DatabaseIdProvider databaseIdProvider) {
this.databaseIdProvider = databaseIdProvider;
}

/**

Mybatis plugin list.
@since 1.0.1
@param plugins list of plugins

*/
public void setPlugins(Interceptor[] plugins) {
this.plugins = plugins;
}

/**

Packages to search for type aliases.
@since 1.0.1
@param typeAliasesPackage package to scan for domain objects

*/
public void setTypeAliasesPackage(String typeAliasesPackage) {
this.typeAliasesPackage = typeAliasesPackage;
}

/**

Super class which domain objects have to extend to have a type alias created.
No effect if there is no package to scan configured.
@since 1.1.2
@param typeAliasesSuperType super class for domain objects

*/
public void setTypeAliasesSuperType(Class typeAliasesSuperType) {
this.typeAliasesSuperType = typeAliasesSuperType;
}

/**

Packages to search for type handlers.
@since 1.0.1
@param typeHandlersPackage package to scan for type handlers

*/
public void setTypeHandlersPackage(String typeHandlersPackage) {
this.typeHandlersPackage = typeHandlersPackage;
}

/**

Set type handlers. They must be annotated with {@code MappedTypes} and optionally with {@code MappedJdbcTypes}
@since 1.0.1
@param typeHandlers Type handler list
*/
public void setTypeHandlers(TypeHandler[] typeHandlers) {
this.typeHandlers = typeHandlers;
}

/**

List of type aliases to register. They can be annotated with {@code Alias}
@since 1.0.1
@param typeAliases Type aliases list
*/
public void setTypeAliases(Class[] typeAliases) {
this.typeAliases = typeAliases;
}

/**

If true, a final check is done on Configuration to assure that all mapped
statements are fully loaded and there is no one still pending to resolve
includes. Defaults to false.
@since 1.0.1
@param failFast enable failFast
*/
public void setFailFast(boolean failFast) {
this.failFast = failFast;
}

/**

Set the location of the MyBatis {@code SqlSessionFactory} config file. A typical value is
“WEB-INF/mybatis-configuration.xml”.
*/
public void setConfigLocation(Resource configLocation) {
this.configLocation = configLocation;
}

/**

Set locations of MyBatis mapper files that are going to be merged into the {@code SqlSessionFactory}
configuration at runtime.
This is an alternative to specifying “<sqlmapper>” entries in an MyBatis config file.
This property being based on Spring’s resource abstraction also allows for specifying
resource patterns here: e.g. “classpath*:sqlmap/*-mapper.xml”.
*/
public void setMapperLocations(Resource[] mapperLocations) {
this.mapperLocations = mapperLocations;
}

/**

Set optional properties to be passed into the SqlSession configuration, as alternative to a
{@code <properties>} tag in the configuration xml file. This will be used to
resolve placeholders in the config file.
*/
public void setConfigurationProperties(Properties sqlSessionFactoryProperties) {
this.configurationProperties = sqlSessionFactoryProperties;
}

/**

Set the JDBC {@code DataSource} that this instance should manage transactions for. The {@code DataSource}
should match the one used by the {@code SqlSessionFactory}: for example, you could specify the same
JNDI DataSource for both.
A transactional JDBC {@code Connection} for this {@code DataSource} will be provided to application code
accessing this {@code DataSource} directly via {@code DataSourceUtils} or {@code DataSourceTransactionManager}.
The {@code DataSource} specified here should be the target {@code DataSource} to manage transactions for, not
a {@code TransactionAwareDataSourceProxy}. Only data access code may work with
{@code TransactionAwareDataSourceProxy}, while the transaction manager needs to work on the
underlying target {@code DataSource}. If there’s nevertheless a {@code TransactionAwareDataSourceProxy}
passed in, it will be unwrapped to extract its target {@code DataSource}.

*/
public void setDataSource(DataSource dataSource) {
if (dataSource instanceof TransactionAwareDataSourceProxy) {
// If we got a TransactionAwareDataSourceProxy, we need to perform
// transactions for its underlying target DataSource, else data
// access code won’t see properly exposed transactions (i.e.
// transactions for the target DataSource).
this.dataSource = ((TransactionAwareDataSourceProxy) dataSource).getTargetDataSource();
} else {
this.dataSource = dataSource;
}
}

/**

Sets the {@code SqlSessionFactoryBuilder} to use when creating the {@code SqlSessionFactory}.
This is mainly meant for testing so that mock SqlSessionFactory classes can be injected. By
default, {@code SqlSessionFactoryBuilder} creates {@code DefaultSqlSessionFactory} instances.

*/
public void setSqlSessionFactoryBuilder(SqlSessionFactoryBuilder sqlSessionFactoryBuilder) {
this.sqlSessionFactoryBuilder = sqlSessionFactoryBuilder;
}

/**

Set the MyBatis TransactionFactory to use. Default is {@code SpringManagedTransactionFactory}
The default {@code SpringManagedTransactionFactory} should be appropriate for all cases:
be it Spring transaction management, EJB CMT or plain JTA. If there is no active transaction,
SqlSession operations will execute SQL statements non-transactionally.
It is strongly recommended to use the default {@code TransactionFactory}. If not used, any
attempt at getting an SqlSession through Spring’s MyBatis framework will throw an exception if
a transaction is active.
@see SpringManagedTransactionFactory
@param transactionFactory the MyBatis TransactionFactory
*/
public void setTransactionFactory(TransactionFactory transactionFactory) {
this.transactionFactory = transactionFactory;
}

/**

NOTE: This class overrides any {@code Environment} you have set in the MyBatis
config file. This is used only as a placeholder name. The default value is
{@code SqlSessionFactoryBean.class.getSimpleName()}.
@param environment the environment name
*/
public void setEnvironment(String environment) {
this.environment = environment;
}

/**

{@inheritDoc}
*/
@Override
public void afterPropertiesSet() throws Exception {
notNull(dataSource, “Property ‘dataSource’ is required”);
notNull(sqlSessionFactoryBuilder, “Property ‘sqlSessionFactoryBuilder’ is required”);

this.sqlSessionFactory = buildSqlSessionFactory();

}

/**

Build a {@code SqlSessionFactory} instance.
The default implementation uses the standard MyBatis {@code XMLConfigBuilder} API to build a
{@code SqlSessionFactory} instance based on an Reader.
@return SqlSessionFactory
@throws IOException if loading the config file failed
*/
protected SqlSessionFactory buildSqlSessionFactory() throws IOException {

Configuration configuration;

XMLConfigBuilder xmlConfigBuilder = null;
if (this.configLocation != null) {
  xmlConfigBuilder = new XMLConfigBuilder(this.configLocation.getInputStream(), null, this.configurationProperties);
  configuration = xmlConfigBuilder.getConfiguration();
} else {
  if (LOGGER.isDebugEnabled()) {
    LOGGER.debug("Property 'configLocation' not specified, using default MyBatis Configuration");
  }
  configuration = new Configuration();
  configuration.setVariables(this.configurationProperties);
}

if (this.objectFactory != null) {
  configuration.setObjectFactory(this.objectFactory);
}

if (this.objectWrapperFactory != null) {
  configuration.setObjectWrapperFactory(this.objectWrapperFactory);
}

if (hasLength(this.typeAliasesPackage)) {
  String[] typeAliasPackageArray = tokenizeToStringArray(this.typeAliasesPackage,
      ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
  for (String packageToScan : typeAliasPackageArray) {
	// ThinkGem 修改实体类重名的时候抛出并打印异常，否则系统会一直递归造成无法启动
	try {
		configuration.getTypeAliasRegistry().registerAliases(packageToScan,
				typeAliasesSuperType == null ? Object.class : typeAliasesSuperType);
	} catch (Exception ex) {
		LOGGER.error("Scanned package: '" + packageToScan + "' for aliases", ex);
		throw new NestedIOException("Scanned package: '" + packageToScan + "' for aliases", ex);
	} finally {
		ErrorContext.instance().reset();
	}
	// ThinkGem end
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Scanned package: '" + packageToScan + "' for aliases");
    }
  }
}

if (!isEmpty(this.typeAliases)) {
  for (Class<?> typeAlias : this.typeAliases) {
    configuration.getTypeAliasRegistry().registerAlias(typeAlias);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Registered type alias: '" + typeAlias + "'");
    }
  }
}

if (!isEmpty(this.plugins)) {
  for (Interceptor plugin : this.plugins) {
    configuration.addInterceptor(plugin);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Registered plugin: '" + plugin + "'");
    }
  }
}

if (hasLength(this.typeHandlersPackage)) {
  String[] typeHandlersPackageArray = tokenizeToStringArray(this.typeHandlersPackage,
      ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
  for (String packageToScan : typeHandlersPackageArray) {
    configuration.getTypeHandlerRegistry().register(packageToScan);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Scanned package: '" + packageToScan + "' for type handlers");
    }
  }
}

if (!isEmpty(this.typeHandlers)) {
  for (TypeHandler<?> typeHandler : this.typeHandlers) {
    configuration.getTypeHandlerRegistry().register(typeHandler);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Registered type handler: '" + typeHandler + "'");
    }
  }
}

if (xmlConfigBuilder != null) {
  try {
    xmlConfigBuilder.parse();

    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Parsed configuration file: '" + this.configLocation + "'");
    }
  } catch (Exception ex) {
    throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex);
  } finally {
    ErrorContext.instance().reset();
  }
}

if (this.transactionFactory == null) {
  this.transactionFactory = new SpringManagedTransactionFactory();
}

configuration.setEnvironment(new Environment(this.environment, this.transactionFactory, this.dataSource));

if (this.databaseIdProvider != null) {
  try {
    configuration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));
  } catch (SQLException e) {
    throw new NestedIOException("Failed getting a databaseId", e);
  }
}

if (!isEmpty(this.mapperLocations)) {
  for (Resource mapperLocation : this.mapperLocations) {
    if (mapperLocation == null) {
      continue;
    }

    try {
      XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(mapperLocation.getInputStream(),
          configuration, mapperLocation.toString(), configuration.getSqlFragments());
      xmlMapperBuilder.parse();
    } catch (Exception e) {
		// ThinkGem MapperXML有错误的时候抛出并打印异常，否则系统会一直递归造成无法启动
    	LOGGER.error("Failed to parse mapping resource: '" + mapperLocation + "'", e);
    	throw new NestedIOException("Failed to parse mapping resource: '" + mapperLocation + "'", e);
    } finally {
      ErrorContext.instance().reset();
    }

    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Parsed mapper file: '" + mapperLocation + "'");
    }
  }
  
  // ThinkGem 启动刷新MapperXML定时器（有助于开发者调试）。
  new MapperRefresh(this.mapperLocations, configuration).run();
  
} else {
  if (LOGGER.isDebugEnabled()) {
    LOGGER.debug("Property 'mapperLocations' was not specified or no matching resources found");
  }
}

return this.sqlSessionFactoryBuilder.build(configuration);

}

/**

{@inheritDoc}
*/
@Override
public SqlSessionFactory getObject() throws Exception {
if (this.sqlSessionFactory == null) {
afterPropertiesSet();
}

return this.sqlSessionFactory;

}

/**

{@inheritDoc}
*/
@Override
public Class getObjectType() {
return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();
}

/**

{@inheritDoc}
*/
@Override
public boolean isSingleton() {
return true;
}

/**

{@inheritDoc}
*/
@Override
public void onApplicationEvent(ApplicationEvent event) {
if (failFast && event instanceof ContextRefreshedEvent) {
// fail-fast -> check all statements are completed
this.sqlSessionFactory.getConfiguration().getMappedStatementNames();
}
}

}

重写SqlSessionFactoryBean就的修改下Spring的MyBatis配置部分：

Xml代码

<bean id="sqlSessionFactory" class="com.thinkgem.jeesite.common.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="typeAliasesPackage" value="com.thinkgem.jeesite"/>
<property name="typeAliasesSuperType" value="<span style="line-height: 1.5;">com.thinkgem.jeesitespan><span style="line-height: 1.5;">.persistence.BaseEntity"/>span>
<property name="mapperLocations" value="classpath*:/mappings/**/*.xml"/>
<property name="configLocation" value="classpath:/mybatis-config.xml">property>
bean>

最后附加上属性配置文件：mybatis-refresh.properties

Java代码

#是否开启刷新线程
enabled=true
#延迟启动刷新程序的秒数
delaySeconds=60
#刷新扫描间隔的时长秒数
sleepSeconds=3
#扫描Mapper文件的资源路径
mappingPath=mappings

#是否开启刷新线程
enabled=true
#延迟启动刷新程序的秒数
delaySeconds=60
#刷新扫描间隔的时长秒数
sleepSeconds=3
#扫描Mapper文件的资源路径
mappingPath=mappings

Java你会用，但这10点实战经验你一定不知道！

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JeeSite 4.0 规划（一） | Java如何正确地写出单例模式

2016-06-13 10:40
浏览 26246
评论(9)

  分类:企业架构      
  查看更多

9 楼 u010199866 2018-06-07

2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [enabled] true
2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [delaySeconds] 60
2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [sleepSeconds] 3
2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [mappingPath] com/cjis/mapping
2018-06-07   15:42:51   [com.cjis.util.MapperRefresh]-[DEBUG]   [location] null
2018-06-07   15:42:52   [com.cjis.util.MapperRefresh]-[DEBUG]   [configuration] org.apache.ibatis.session.Configuration@9367551
Exception in thread "MyBatis-Mapper-Refresh" java.lang.NoClassDefFoundError: com/google/common/collect/Sets
at com.cjis.util.MapperRefresh$1.run(MapperRefresh.java:101)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Sets
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
... 2 more

按照楼主的操作，报错呢请问这是为啥

8 楼 juxiaojun114 2018-03-04

jeesite 使用idea导入开发，启动tomcat后为啥看不到========= Enabled refresh mybatis mapper ========= 这个提示信息使用eclipse没有这个问题，是我的idea设置有问题吗？

7 楼 aaddsfdsfsdfs 2017-12-18

真心给个赞，可以的，忒提高开发效率了，配合自己写的通用后台框架，所有业务逻辑直接用js写的话，一次部署，后面基本都是热部署了，满意

6 楼 lovewinner 2017-04-17

5 楼空城旧梦已秋凉 2016-11-29

为何不了解一下nutz框架

4 楼 zhugeyangyang1994 2016-06-18

围观大神

3 楼 agen19866 2016-06-16

MyBatis SqlSessionFactoryBean

文件第5行一定要这样写么？

2 楼 8465279130 2016-06-15

赞!!!

1 楼 greatpwx 2016-06-13

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