package com.btoddb.fastpersitentqueue.flume;
/*
* #%L
* fast-persistent-queue
* %%
* Copyright (C) 2014 btoddb.com
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import com.btoddb.fastpersitentqueue.Fpq;
import com.btoddb.fastpersitentqueue.Utils;
import org.apache.flume.*;
import org.apache.flume.channel.BasicChannelSemantics;
import org.apache.flume.channel.BasicTransactionSemantics;
import org.apache.flume.instrumentation.ChannelCounter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
/**
*
*/
public class FpqChannel extends BasicChannelSemantics {
private static final Logger logger = LoggerFactory.getLogger(FpqChannel.class);
private EventSerializer eventSerializer = new EventSerializer();
private Fpq fpq;
private long maxJournalFileSize;
private int numberOfFlushWorkers;
private long flushPeriodInMs;
private long maxJournalDurationInMs;
private File journalDirectory;
private long maxMemorySegmentSizeInBytes;
private File pagingDirectory;
private int maxTransactionSize;
private ChannelCounter channelCounter;
@Override
protected BasicTransactionSemantics createTransaction() {
return new FpqTransaction(fpq, eventSerializer, fpq.getMaxTransactionSize(), channelCounter);
}
@Override
public void configure(Context context) {
super.configure(context);
setMaxJournalFileSize(context.getLong("maxJournalFileSize", 10000000L));
setNumberOfFlushWorkers(context.getInteger("numberOfFlushWorkers", 4));
setFlushPeriodInMs(context.getLong("flushPeriodInMs", 10000L));
setMaxJournalDurationInMs(context.getLong("maxJournalDurationInMs", 30000L));
setJournalDirectory(new File(context.getString("journalDirectory")));
setMaxMemorySegmentSizeInBytes(context.getLong("maxMemorySegmentSizeInBytes", 10000000L));
setPagingDirectory(new File(context.getString("pagingDirectory")));
setMaxTransactionSize(context.getInteger("transactionCapacity", 2000));
if (channelCounter == null) {
channelCounter = new ChannelCounter(getName());
}
}
@Override
public void start() {
fpq = new Fpq();
fpq.setQueueName("fpq-flume-"+getName());
fpq.setMaxJournalFileSize(maxJournalFileSize);
fpq.setNumberOfFlushWorkers(numberOfFlushWorkers);
fpq.setFlushPeriodInMs(flushPeriodInMs);
fpq.setMaxJournalDurationInMs(maxJournalDurationInMs);
fpq.setJournalDirectory(journalDirectory);
fpq.setMaxMemorySegmentSizeInBytes(maxMemorySegmentSizeInBytes);
fpq.setPagingDirectory(pagingDirectory);
fpq.setMaxTransactionSize(maxTransactionSize);
try {
fpq.init();
}
catch (IOException e) {
Utils.logAndThrow(logger, "exception while starting FPQ", e);
}
if (channelCounter == null) {
channelCounter = new ChannelCounter(getName());
}
channelCounter.start();
channelCounter.setChannelSize(fpq.getNumberOfEntries());
channelCounter.setChannelCapacity(0);
super.start();
}
@Override
public synchronized void stop() {
if (null != fpq) {
fpq.shutdown();
}
if (null != channelCounter) {
channelCounter.setChannelSize(fpq.getNumberOfEntries());
channelCounter.stop();
}
super.stop();
}
public boolean isEmpty() {
return fpq.isEmpty();
}
public long getMaxJournalFileSize() {
return maxJournalFileSize;
}
public void setMaxJournalFileSize(long maxJournalFileSize) {
this.maxJournalFileSize = maxJournalFileSize;
}
public int getNumberOfFlushWorkers() {
return numberOfFlushWorkers;
}
public void setNumberOfFlushWorkers(int numberOfFlushWorkers) {
this.numberOfFlushWorkers = numberOfFlushWorkers;
}
public long getFlushPeriodInMs() {
return flushPeriodInMs;
}
public void setFlushPeriodInMs(long flushPeriodInMs) {
this.flushPeriodInMs = flushPeriodInMs;
}
public long getMaxJournalDurationInMs() {
return maxJournalDurationInMs;
}
public void setMaxJournalDurationInMs(long maxJournalDurationInMs) {
this.maxJournalDurationInMs = maxJournalDurationInMs;
}
public File getJournalDirectory() {
return journalDirectory;
}
public void setJournalDirectory(File journalDirectory) {
this.journalDirectory = journalDirectory;
}
public long getMaxMemorySegmentSizeInBytes() {
return maxMemorySegmentSizeInBytes;
}
public void setMaxMemorySegmentSizeInBytes(long maxMemorySegmentSizeInBytes) {
this.maxMemorySegmentSizeInBytes = maxMemorySegmentSizeInBytes;
}
public File getPagingDirectory() {
return pagingDirectory;
}
public void setPagingDirectory(File pagingDirectory) {
this.pagingDirectory = pagingDirectory;
}
public int getMaxTransactionSize() {
return maxTransactionSize;
}
public void setMaxTransactionSize(int maxTransactionSize) {
this.maxTransactionSize = maxTransactionSize;
}
}