因为网上Kudu的相关资料不多，我也就照着kudu-example 和 kudu的Java API自己写写试试，有待改进，如果哪位大佬有更好的改进建议欢迎告诉我~
话不多说，直接上代码。
import java.util.ArrayList;
import java.util.List;
import org.apache.kudu.ColumnSchema;
import org.apache.kudu.ColumnSchema.ColumnSchemaBuilder;
import org.apache.kudu.Schema;
import org.apache.kudu.Type;
import org.apache.kudu.client.*;
public class KuduTest {
private static final StringKUDU_MASTER =
System.getProperty("kuduMaster", "192.168.1.32");
private KuduClientclient;
private KuduTabletable;
private ListTablesResponselistTablesResponse;
private KuduTableColkuduTableCol =new KuduTableCol();
public static void main(String[] args) {
KuduTest kuduTest =new KuduTest();
// kuduTest.createTestTableWay();
// kuduTest.createAiji66_TableWay();
//建立连接
kuduTest.getConnection();
// System.out.println("开始建表");
// //创建kudu表
// //kuduTest.createTable(kuduTest.kuduTableCol);
// System.out.println("建表结束");
kuduTest.showTables();
// System.out.println("开始添加数据");
// //添加单条数据测试
// kuduTest.insertTimeColumn();
// System.out.println("添加数据结束");
// kuduTest.showTables();
// System.out.println("批量添加数据");
// //添加多条数据测试
// kuduTest.inserColumns();
// System.out.println("批量添加数据结束");
// kuduTest.showTables();
// //阅读列数据
// kuduTest.scanRows();
// System.out.println("执行结束");
// //删除表
// System.out.println("开始删除数据表");
// kuduTest.deleteTable("aiji66_log");
}
//0.和master主机端建立连接
public void getConnection(){
//Creates a new client that connects to the masters.
this.client =new KuduClient.KuduClientBuilder(KUDU_MASTER).build();
}
//1.show tables;
public void showTables(){
try {
listTablesResponse =this.client.getTablesList();
for(String tableString :listTablesResponse.getTablesList()) {
System.out.println(tableString);
}
}catch (KuduException e) {
e.printStackTrace();
}
}
//2.1设置元素--这里是我们以后建表需要经常修改的地方
public void createTableWay(){
//2.1.1 设置table表名
this.kuduTableCol.setTableName("user_test");
//2.2.2 设置colmun表字段
/**
* ("字段名",字段类型).key(boolean 是否为行键).encoding(字符编码).nullable(true 表是否设计为空).build() --构建
*/
List cols =new ArrayList<>();
//cols.add(new ColumnSchemaBuilder("id", Type.INT32).key(true).nullable(true).build());
cols.add(new ColumnSchemaBuilder("id", Type.INT32).key(true).build());
cols.add(new ColumnSchemaBuilder("name", Type.STRING).key(true).build());
cols.add(new ColumnSchemaBuilder("ip", Type.INT64).key(true).build());
cols.add(new ColumnSchemaBuilder("value", Type.STRING).build());
this.kuduTableCol.setTableSchema(cols);
//2.2.3 设置分区
List rangeKeys =new ArrayList();
rangeKeys.add("id");
rangeKeys.add("name");
rangeKeys.add("ip");
this.kuduTableCol.setTableBuilder(rangeKeys);
}
//2. create table 创建表
public void createTable(KuduTableCol kuduTableCol){
try {
if (client.tableExists(kuduTableCol.getTableName())) {
return;
}
//这里是建表语句，注意，第三个分区选项有时候也需要修改
table =this.client.createTable(kuduTableCol.getTableName(),kuduTableCol.getTableSchema(),new CreateTableOptions().setRangePartitionColumns(kuduTableCol.getTableBuilder()));
}catch (KuduException e) {
e.printStackTrace();
}
}
//3.insert column 添加数据
public void insertColumn() {
try {
KuduSession session =this.client.newSession();
table =this.client.openTable("user_test");
Insert insert =table.newInsert();
insert.getRow().addInt("id", 1);
insert.getRow().addString("name","张三");
insert.getRow().addLong("ip",2017121801);
insert.getRow().addString("value","这是添加的第一个角色，就像一般的剧情一样，可能有一些不平凡的主角光环在里面");
session.apply(insert);
}catch (KuduException e) {
e.printStackTrace();
}
}
//3.1批量插入数据,待改进
public void inserColumns() {
try {
KuduSession session =this.client.newSession();
table =this.client.openTable("user_test");
GetWay getWay =new GetWay();
long j =2017122001;
for (int i =1; i <500;i++ ) {
Insert insert =table.newInsert();
insert.getRow().addInt("id",i);
insert.getRow().addString("name",getWay.getName());
insert.getRow().addLong("ip",j);
insert.getRow().addString("value","批量插入的数据");
session.apply(insert);
j+=1;
}
}catch (KuduException e) {
e.printStackTrace();
}
}
//4.update column 更新数据
public void updateColumn() {
try {
KuduSession session =this.client.newSession();
table =this.client.openTable("kevin_table");
Update update =table.newUpdate();
update.getRow().addInt("id",1);
update.getRow().addString("name","张三大大");
session.apply(update);
}catch (KuduException e) {
e.printStackTrace();
}
}
//5.delete column 删除数据
public void deleteColumn() {
try {
KuduSession session =this.client.newSession();
table =this.client.openTable("kevin_table");
Delete delete =table.newDelete();
delete.getRow().addInt("id",1);
session.apply(delete);
}catch (KuduException e) {
e.printStackTrace();
}
}
//6.KuduScanner 阅读列数据
public void scanRows(){
try {
List columnNames =new ArrayList();
columnNames.add("name");
table =this.client.openTable("user_test");
KuduScanner scanner =this.client.newScannerBuilder(table).setProjectedColumnNames(columnNames).build();
while (scanner.hasMoreRows()) {
for (RowResult row : scanner.nextRows()) {
System.out.println(row.getString("name"));
}
}
}catch (KuduException e) {
e.printStackTrace();
}
}
//6.1 KuduScanner阅读列数据-指定上下限
public void scanRow(){
List projectColumns =new ArrayList(1);
projectColumns.add("id");
projectColumns.add("name");
projectColumns.add("ip");
try {
table =this.client.openTable("user_test");
Schema schema =table.getSchema();
PartialRow partialRow = schema.newPartialRow();
partialRow.addInt("id", 1);
PartialRow partialRow1 = schema.newPartialRow();
partialRow1.addInt("id", 2);
KuduScanner scanner =this.client.newScannerBuilder(table)
.setProjectedColumnNames(projectColumns)//指定输出列
.lowerBound(partialRow)//指定下限（包含）
.exclusiveUpperBound(partialRow1)//指定上限（不包含）
.build();
while (scanner.hasMoreRows()) {
for (RowResult row : scanner.nextRows()) {
System.out.println(row.getString("name"));
System.out.println(row.getInt("id")+" "+row.getString("name")+" "+row.getString("ip"));
}
}
}catch (KuduException e) {
e.printStackTrace();
}
}
//7.Kudu deleteTable
public void deleteTable(String tableName) {
try {
if (!client.tableExists(tableName)) {
return;
}
this.client.deleteTable(tableName);
System.out.println("该表已删除");
}catch (KuduException e) {
e.printStackTrace();
}
}
自己封装了一个类，方便传参。。。
import org.apache.kudu.ColumnSchema;
import org.apache.kudu.Schema;
import java.util.List;
public class KuduTableCol {
private String tableName;
private Schema tableSchema;
private List tableBuilder;
public String getTableName() {
return tableName;
}
public void setTableName(String tableName) {
this.tableName = tableName;
}
public Schema getTableSchema() {
return tableSchema;
}
public void setTableSchema(List cols) {
this.tableSchema = new Schema(cols);
}
public List getTableBuilder() {
return tableBuilder;
}
public void setTableBuilder(List tableBuilder) {
this.tableBuilder = tableBuilder;
}
}
暂时就酱=。=