HBase開發 之 表操作

本文的主線 項目 => 新增 => 列表 => 詳情 => 刪除

本文的示例代碼參考hbase-table

啓動HBase服務參考HBase搭建 之 單機模式

項目

spring init -b=2.2.10.RELEASE -j=1.8 -l=java -d=web --build=gradle hbase-table && cd hbase-table

vim build.gradle

dependencies {
    implementation('org.springframework.boot:spring-boot-starter-web') {
        exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging'
    }
    implementation('org.apache.hbase:hbase-client:2.2.6')
    testImplementation('org.springframework.boot:spring-boot-starter-test') {
        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
    }
}

新增

vim src/main/java/com/example/hbasetable/TableController.java

package com.example.hbasetable;

import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.springframework.web.bind.annotation.*;

import java.io.IOException;
import java.util.Map;

@RestController
@RequestMapping("/tables")
public class TableController {
    @PostMapping
    public String create(@RequestBody Map<String, String> data) throws IOException {
        TableName tableName = TableName.valueOf(data.get("tableName"));
        String familyName = data.get("familyName");

        TableDescriptorBuilder tableDescriptorBuilder = TableDescriptorBuilder.newBuilder(tableName);
        ColumnFamilyDescriptorBuilder columnFamilyDescriptorBuilder = ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes(familyName));
        tableDescriptorBuilder.setColumnFamily(columnFamilyDescriptorBuilder.build());

        Connection connection = ConnectionFactory.createConnection();
        Admin admin = connection.getAdmin();
        admin.createTable(tableDescriptorBuilder.build());
        return tableName.toString();
    }
}

./gradlew bootrun

curl -X POST  -H 'Content-Type: application/json' -d '{"tableName" : "test","familyName" : "cf"}' http://localhost:8080/tables
# test

./bin/hbase shell

list

列表

vim src/main/java/com/example/hbasetable/TableController.java

package com.example.hbasetable;

import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.springframework.web.bind.annotation.*;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/tables")
public class TableController {
    // 省略了未修改代碼
    @GetMapping
    public List<String> index() throws IOException {
        Connection connection = ConnectionFactory.createConnection();
        Admin admin = connection.getAdmin();

        List<String> tableNameList = new ArrayList<>();
        for (TableName tableName : admin.listTableNames()) {
            tableNameList.add(tableName.toString());
        }
        return tableNameList;
    }
}

./gradlew bootrun

curl http://localhost:8080/tables
# ["test"]

詳情

vim src/main/java/com/example/hbasetable/TableController.java

package com.example.hbasetable;

import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.springframework.web.bind.annotation.*;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/tables")
public class TableController {
    // 省略了未修改代碼
    @GetMapping("/{tableName}")
    public List<String> show(@PathVariable("tableName") String tableName) throws IOException {
        Connection connection = ConnectionFactory.createConnection();
        Admin admin = connection.getAdmin();

        List<String> columnFamilyList = new ArrayList<String>();
        for (TableDescriptor tableDescriptor : admin.listTableDescriptors()) {
            if (tableDescriptor.getTableName().toString().equals(tableName)) {
                for (ColumnFamilyDescriptor columnFamilyDescriptor : tableDescriptor.getColumnFamilies()) {
                    columnFamilyList.add(columnFamilyDescriptor.getNameAsString());
                }
            }
        }
        return columnFamilyList;
    }
}

./gradlew bootrun

curl http://localhost:8080/tables/test
# ["cf"]

刪除

vim src/main/java/com/example/hbasetable/TableController.java

package com.example.hbasetable;

import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.springframework.web.bind.annotation.*;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/tables")
public class TableController {
    // 省略了未修改代碼
    @DeleteMapping("/{tableName}")
    public String delete(@PathVariable("tableName") String tableName) throws IOException {
        Connection connection = ConnectionFactory.createConnection();
        Admin admin = connection.getAdmin();

        admin.disableTable(TableName.valueOf(tableName));
        admin.deleteTable(TableName.valueOf(tableName));
        return tableName;
    }
}

./gradlew bootrun

curl -X DELETE http://localhost:8080/tables/test
# test

參考

• HBase with Java