昨天研究了半天apache geode，通过gfsh命令查询和操作比较简单，但是如何通过程序查询因为资历太少，没有搞懂，试验了半天才明白

1.创建测试region

create region --name=user --type=REPLICATE_PERSISTENT


2.用eclipse创建maven工程

修改pom.xml,需要引入gemfire-8.2.0.jar,这个在


  4.0.0

  io.proinsight
  hellogeode
  0.0.1-SNAPSHOT
  jar

  hellogeode
  http://maven.apache.org

  
    UTF-8
  

  
  
	
	    org.apache.geode
	    geode-core
	    1.2.0
	
	
    

    org.apache.geode
    geode-json
    1.2.0

    
    

    org.apache.geode
    geode-common
    1.2.0

	
			log4j
			log4j
			1.2.17
		
		

    org.apache.logging.log4j
    log4j-core
    2.8.2



    org.apache.logging.log4j
    log4j-api
    2.8.2


		

    log4j
    log4j
    1.2.17


			commons-codec
			commons-codec
			1.10
		
		
		
			org.apache.commons
			commons-lang3
			3.4
		
    	
			junit
			junit
			4.12
		
		
			
		    com.alibaba
		    fastjson
		    1.2.13
		
  

  
  			
                org.apache.maven.plugins
                maven-compiler-plugin
                3.3
                
                    1.8
                    1.8
                
            
          
            org.apache.maven.plugins  
            maven-jar-plugin  
            2.6  
              
                  
                      
                        true  
                        lib/  
                        io.proinsight.hellogeode.App  
                     
     
                 
    
              
          
          
            org.apache.maven.plugins  
            maven-dependency-plugin  
            2.10  
              
                  
                    copy-dependencies  
                    package  
                      
                        copy-dependencies  
                      
                      
                        ${project.build.directory}/lib  
                      
                  
              
        
    
  


新建UserBean.java

package io.proinsight.hellogeode;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import java.util.Date;

import org.apache.geode.DataSerializable;
import org.apache.geode.DataSerializer;

public class UserBean implements DataSerializable{
	/**
	 * 必须有这个方法，否则查询会报没有init()这个方法
	 * */
	public UserBean() {
		
	}
	public UserBean(int id2, int i, String string, Date date) {
		// TODO Auto-generated constructor stub
		this.id=id2;
		this.age=i;
		this.name=string;
		this.createTime=date;
	}
	/**
     * id
     * */
	private int id;
	
	/**
     * 年龄
     * */
    private int age;
    /**
     * 姓名
     * */
    private String name;
    /**
     * 创建时间
     * */
    private Date createTime;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Date getCreateTime() {
		return createTime;
	}
	
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
	public void fromData(DataInput in) throws IOException, ClassNotFoundException {
		this.id = in.readInt();
		this.age=in.readInt();
	     this.name = in.readUTF();
	     this.createTime = DataSerializer.readDate(in);
		
	}
	public void toData(DataOutput out) throws IOException {
		 out.writeInt(this.id);
		 out.writeInt(this.age);
	     out.writeUTF(this.name);
	     DataSerializer.writeDate(this.createTime, out);
		
	}
}


修改App.java

package io.proinsight.hellogeode;

import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.apache.geode.DataSerializer;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.RegionFactory;
import org.apache.geode.cache.client.ClientCache;
import org.apache.geode.cache.client.ClientCacheFactory;
import org.apache.geode.cache.client.ClientRegionFactory;
import org.apache.geode.cache.client.ClientRegionShortcut;
import org.apache.geode.cache.query.internal.ResultsBag;

import com.alibaba.fastjson.JSON;

/**
 * Hello world!
 *
 */
public class App 
{
	String regionName="user";
	int userNum=10;
    public static void main( String[] args )
    {
    	new App().test();
    }
    
    public void test(){
    	Region region = null;
 	   ClientCache cache = new ClientCacheFactory().addPoolLocator("192.168.60.50", 10334).create();
 
 	   ClientRegionFactory rf = cache.createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY);
 	   //打开user表
       region = rf.create(regionName);
        
       System.out.println("开始创建用户");
        create(region);
        select(region);
        System.out.println("完成创建用户");
        
        
        System.out.println("开始修改用户");
        update(region);
        select(region);
        System.out.println("完成修改用户");
        
        
        System.out.println("开始删除用户");
        delete(region,108);
        select(region);
        System.out.println("完成删除用户");
        
        
        System.out.println("开始清空表");
        truncate(region);
        select(region);
        System.out.println("完成清空表");
        
        //关闭表
        region.close();
    }
    
    /**
     * 查询user表
     * */
    public void select(Region region){
        try {
            Object objList = region.query("select * from /"+regionName+" u where u.age > 15");
           
            if(objList != null && objList instanceof ResultsBag){
                Iterator iter = ((ResultsBag) objList).iterator();
                while(iter.hasNext()){
                    UserBean userBean = (UserBean) iter.next();
                    System.out.println("User信息："+JSON.toJSONString(userBean));
                }
            }
            Object obj = region.get(108);
            if(obj != null && obj instanceof UserBean){
                System.out.println("User108信息"+JSON.toJSONString(obj));
            }
        }catch (Exception e){
        	e.printStackTrace();
//            logger.error("error occured.", e);
        }
    }
   
    
    /**
     * 增加10个
     * */
    public void create(Region region){
    	for (int i = 0; i < userNum; i++) {
            int id = i+100;
            region.put(id, new UserBean(id,10+i,"username:"+id,new Date()));
        }
    }
    
    
    /**
     * 修改
     * */
    public void update(Region region){
        UserBean user108= (UserBean) region.get(108);
        if(user108 != null && user108 instanceof UserBean){
            System.out.println("User108信息"+JSON.toJSONString(user108));
          //修改年龄为
            user108.setAge(12);
            region.put(user108.getId(), user108);
        }
        
    }
    
    /**
     * 删除某个用户
     * */
    public void delete(Region region,Integer id){
        region.remove(id);
    }
    
    
    /**
     * 清空表
     * */
    public void truncate(Region region){
        region.clear();
    }
    
   
}



3.打包

maven install一下

在target目录下有对应的jar包

然后把hellogeode-0.0.1-SNAPSHOT.jar拷贝到geode服务器上某个目录例如/tmp/t/下

4.发布Jar到geode里

为啥要发布到geode里呢？因为我们用UserBean的序列化和反序列化作为表结构，因此deode查询时需要UserBean.class，因此我们发布hellogeode-0.0.1-SNAPSHOT.jar到geode，主要是为了把UserBean.class导入到geode里；

gfsh>deploy  --jar=/tmp/t/hellogeode-0.0.1-SNAPSHOT.jar 
 Member  |         Deployed JAR          | Deployed JAR Location
-------- | ----------------------------- | -----------------------------------------------------------------
server50 | hellogeode-0.0.1-SNAPSHOT.jar | /opt/apache-geode-1.2.1/server50/hellogeode-0.0.1-SNAPSHOT.v1.jar

若是我们对UserBean有修改的话，需要先卸载jar,然后再重新发布

gfsh>undeploy  --jar=hellogeode-0.0.1-SNAPSHOT.jar 
 Member  |        Un-Deployed JAR        | Un-Deployed From JAR Location
-------- | ----------------------------- | -----------------------------------------------------------------
server50 | hellogeode-0.0.1-SNAPSHOT.jar | /opt/apache-geode-1.2.1/server50/hellogeode-0.0.1-SNAPSHOT.v1.jar

gfsh>deploy  --jar=/tmp/t/hellogeode-0.0.1-SNAPSHOT.jar 
 Member  |         Deployed JAR          | Deployed JAR Location
-------- | ----------------------------- | -----------------------------------------------------------------
server50 | hellogeode-0.0.1-SNAPSHOT.jar | /opt/apache-geode-1.2.1/server50/hellogeode-0.0.1-SNAPSHOT.v1.jar

5.测试

测试程序在eclipse里运行即可，不需要放到服务器上运行

在eclipse运行app.java

测试结果

开始创建用户
[info 2017/09/27 13:09:13.422 CST  tid=0x17] AutoConnectionSource discovered new locators [slave1/211.98.71.195:10334]

[info 2017/09/27 13:09:13.511 CST 
 tid=0x1] Updating membership port.  Port changed from 0 to 51,084.  ID is now bogon(92040:loner):0:0c29bdc1

User信息：{"age":12,"createTime":1506488953578,"id":102,"name":"username:102"}
User信息：{"age":15,"createTime":1506488953592,"id":105,"name":"username:105"}
User信息：{"age":14,"createTime":1506488953588,"id":104,"name":"username:104"}
User信息：{"age":10,"createTime":1506488953405,"id":100,"name":"username:100"}
User信息：{"age":19,"createTime":1506488953611,"id":109,"name":"username:109"}
User信息：{"age":13,"createTime":1506488953583,"id":103,"name":"username:103"}
User信息：{"age":18,"createTime":1506488953606,"id":108,"name":"username:108"}
User信息：{"age":11,"createTime":1506488953573,"id":101,"name":"username:101"}
User信息：{"age":16,"createTime":1506488953597,"id":106,"name":"username:106"}
User信息：{"age":17,"createTime":1506488953602,"id":107,"name":"username:107"}
User108信息{"age":18,"createTime":1506488953606,"id":108,"name":"username:108"}
完成创建用户
开始修改用户
User108信息{"age":18,"createTime":1506488953606,"id":108,"name":"username:108"}
User信息：{"age":17,"createTime":1506488953602,"id":107,"name":"username:107"}
User信息：{"age":12,"createTime":1506488953578,"id":102,"name":"username:102"}
User信息：{"age":15,"createTime":1506488953592,"id":105,"name":"username:105"}
User信息：{"age":12,"createTime":1506488953606,"id":108,"name":"username:108"}
User信息：{"age":13,"createTime":1506488953583,"id":103,"name":"username:103"}
User信息：{"age":19,"createTime":1506488953611,"id":109,"name":"username:109"}
User信息：{"age":16,"createTime":1506488953597,"id":106,"name":"username:106"}
User信息：{"age":11,"createTime":1506488953573,"id":101,"name":"username:101"}
User信息：{"age":14,"createTime":1506488953588,"id":104,"name":"username:104"}
User信息：{"age":10,"createTime":1506488953405,"id":100,"name":"username:100"}
User108信息{"age":12,"createTime":1506488953606,"id":108,"name":"username:108"}
完成修改用户
开始删除用户
User信息：{"age":15,"createTime":1506488953592,"id":105,"name":"username:105"}
User信息：{"age":12,"createTime":1506488953578,"id":102,"name":"username:102"}
User信息：{"age":16,"createTime":1506488953597,"id":106,"name":"username:106"}
User信息：{"age":10,"createTime":1506488953405,"id":100,"name":"username:100"}
User信息：{"age":13,"createTime":1506488953583,"id":103,"name":"username:103"}
User信息：{"age":19,"createTime":1506488953611,"id":109,"name":"username:109"}
User信息：{"age":11,"createTime":1506488953573,"id":101,"name":"username:101"}
User信息：{"age":17,"createTime":1506488953602,"id":107,"name":"username:107"}
User信息：{"age":14,"createTime":1506488953588,"id":104,"name":"username:104"}
完成删除用户
开始清空表
完成清空表