org.smartloli.kafka.eagle.core.ipc.RpcClient.java Source code

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Here is the source code for org.smartloli.kafka.eagle.core.ipc.RpcClient.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.smartloli.kafka.eagle.core.ipc;

import org.apache.thrift.protocol.TCompactProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TFramedTransport;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.smartloli.kafka.eagle.common.util.SystemConfigUtils;

/**
 * Rpc through the Kafka stored in the offset.
 * 
 * @author smartloli.
 *
 *         Created by Jan 5, 2017
 */
public class RpcClient {

    private final static Logger LOG = LoggerFactory.getLogger(RpcClient.class);
    /** Rpc client port. */
    private final static int PORT = SystemConfigUtils.getIntProperty("kafka.eagle.offset.rpc.port");
    /** Rpc server address. */
    private final static String ADDR = "127.0.0.1";
    /** Rpc timeout. */
    private final static int TIMEOUT = SystemConfigUtils.getIntProperty("kafka.eagle.offset.rpc.timeout");

    /** Get consumer offset from Rpc server. */
    public static String getOffset(String clusterAlias) {
        TTransport transport = new TFramedTransport(new TSocket(ADDR, PORT, TIMEOUT));
        TProtocol protocol = new TCompactProtocol(transport);
        OffsetMetadataServer.Client client = new OffsetMetadataServer.Client(protocol);
        String target = "";
        try {
            transport.open();
            target = client.getOffset(clusterAlias);
        } catch (Exception e) {
            LOG.error("Rpc Client getOffset has error,msg is " + e.getMessage());
        } finally {
            transport.close();
        }
        return target;
    }

    /** Get consumer system topic from Rpc server. */
    public static void system(String bootstrapServers) {
        TTransport transport = new TFramedTransport(new TSocket(ADDR, PORT, TIMEOUT));
        TProtocol protocol = new TCompactProtocol(transport);
        OffsetMetadataServer.Client client = new OffsetMetadataServer.Client(protocol);
        try {
            transport.open();
            client.system(bootstrapServers);
        } catch (Exception e) {
            LOG.error("Rpc Client system topic has error,msg is " + e.getMessage());
        } finally {
            transport.close();
        }
    }

}