com.ngdata.sep.demo.LoggingConsumer.java Source code

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Here is the source code for com.ngdata.sep.demo.LoggingConsumer.java

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/*
 * Copyright 2012 NGDATA nv
 *
 * 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.ngdata.sep.demo;

import java.util.List;

import com.ngdata.sep.EventListener;
import com.ngdata.sep.PayloadExtractor;
import com.ngdata.sep.SepEvent;
import com.ngdata.sep.SepModel;
import com.ngdata.sep.impl.BasePayloadExtractor;
import com.ngdata.sep.impl.SepConsumer;
import com.ngdata.sep.impl.SepModelImpl;
import com.ngdata.sep.util.zookeeper.ZkUtil;
import com.ngdata.sep.util.zookeeper.ZooKeeperItf;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.util.Bytes;

/**
 * A simple consumer that just logs the events.
 */
public class LoggingConsumer {
    public static void main(String[] args) throws Exception {
        Configuration conf = HBaseConfiguration.create();
        conf.setBoolean("hbase.replication", true);

        ZooKeeperItf zk = ZkUtil.connect("localhost", 20000);
        SepModel sepModel = new SepModelImpl(zk, conf);

        final String subscriptionName = "logger";

        if (!sepModel.hasSubscription(subscriptionName)) {
            sepModel.addSubscriptionSilent(subscriptionName);
        }

        PayloadExtractor payloadExtractor = new BasePayloadExtractor(Bytes.toBytes("sep-user-demo"),
                Bytes.toBytes("info"), Bytes.toBytes("payload"));

        SepConsumer sepConsumer = new SepConsumer(subscriptionName, 0, new EventLogger(), 1, "localhost", zk, conf,
                payloadExtractor);

        sepConsumer.start();
        System.out.println("Started");

        while (true) {
            Thread.sleep(Long.MAX_VALUE);
        }
    }

    private static class EventLogger implements EventListener {
        @Override
        public void processEvents(List<SepEvent> sepEvents) {
            for (SepEvent sepEvent : sepEvents) {
                System.out.println("Received event:");
                System.out.println("  table = " + Bytes.toString(sepEvent.getTable()));
                System.out.println("  row = " + Bytes.toString(sepEvent.getRow()));
                System.out.println("  payload = " + Bytes.toString(sepEvent.getPayload()));
                System.out.println("  key values = ");
                for (KeyValue kv : sepEvent.getKeyValues()) {
                    System.out.println("    " + kv.toString());
                }
            }
        }
    }
}