| /** |
| * 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.apache.camel.component.hdfs; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.impl.DefaultProducer; |
| |
| public class HdfsProducer extends DefaultProducer { |
| |
| private final HdfsConfiguration config; |
| private final StringBuilder hdfsPath; |
| private final AtomicBoolean idle = new AtomicBoolean(false); |
| private ScheduledExecutorService scheduler; |
| private HdfsOutputStream ostream; |
| private long splitNum; |
| |
| public static final class SplitStrategy { |
| private SplitStrategyType type; |
| private long value; |
| |
| public SplitStrategy(SplitStrategyType type, long value) { |
| this.type = type; |
| this.value = value; |
| } |
| |
| public SplitStrategyType getType() { |
| return type; |
| } |
| |
| public long getValue() { |
| return value; |
| } |
| } |
| |
| public enum SplitStrategyType { |
| BYTES { |
| @Override |
| public boolean split(HdfsOutputStream oldOstream, long value, HdfsProducer producer) { |
| return oldOstream.getNumOfWrittenBytes() >= value; |
| } |
| }, |
| |
| MESSAGES { |
| @Override |
| public boolean split(HdfsOutputStream oldOstream, long value, HdfsProducer producer) { |
| return oldOstream.getNumOfWrittenMessages() >= value; |
| } |
| }, |
| |
| IDLE { |
| @Override |
| public boolean split(HdfsOutputStream oldOstream, long value, HdfsProducer producer) { |
| return producer.idle.get(); |
| } |
| }; |
| |
| public abstract boolean split(HdfsOutputStream oldOstream, long value, HdfsProducer producer); |
| } |
| |
| public HdfsProducer(HdfsEndpoint endpoint, HdfsConfiguration config) { |
| super(endpoint); |
| this.config = config; |
| this.hdfsPath = config.getFileSystemType().getHdfsPath(config); |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| super.doStart(); |
| StringBuilder actualPath = new StringBuilder(hdfsPath); |
| if (config.getSplitStrategies().size() > 0) { |
| actualPath = newFileName(); |
| } |
| ostream = HdfsOutputStream.createOutputStream(actualPath.toString(), config); |
| |
| SplitStrategy idleStrategy = null; |
| for (SplitStrategy strategy : config.getSplitStrategies()) { |
| if (strategy.type == SplitStrategyType.IDLE) { |
| idleStrategy = strategy; |
| break; |
| } |
| } |
| if (idleStrategy != null) { |
| scheduler = getEndpoint().getCamelContext().getExecutorServiceStrategy().newScheduledThreadPool(this, "IdleCheck", 1); |
| log.debug("Creating IdleCheck task scheduled to run every {} millis", config.getCheckIdleInterval()); |
| scheduler.scheduleAtFixedRate(new IdleCheck(idleStrategy), 1000, config.getCheckIdleInterval(), TimeUnit.MILLISECONDS); |
| } |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| super.doStop(); |
| ostream.close(); |
| if (scheduler != null) { |
| getEndpoint().getCamelContext().getExecutorServiceStrategy().shutdown(scheduler); |
| scheduler = null; |
| } |
| } |
| |
| @Override |
| public void process(Exchange exchange) throws Exception { |
| Object body = exchange.getIn().getBody(); |
| Object key = exchange.getIn().getHeader(HdfsHeader.KEY.name()); |
| |
| boolean split = false; |
| List<SplitStrategy> strategies = config.getSplitStrategies(); |
| for (SplitStrategy splitStrategy : strategies) { |
| split |= splitStrategy.getType().split(ostream, splitStrategy.value, this); |
| } |
| |
| if (split) { |
| ostream.close(); |
| StringBuilder actualPath = newFileName(); |
| ostream = HdfsOutputStream.createOutputStream(actualPath.toString(), config); |
| } |
| ostream.append(key, body, exchange.getContext().getTypeConverter()); |
| idle.set(false); |
| } |
| |
| public HdfsOutputStream getOstream() { |
| return ostream; |
| } |
| |
| private StringBuilder newFileName() { |
| StringBuilder actualPath = new StringBuilder(hdfsPath); |
| actualPath.append(splitNum); |
| splitNum++; |
| return actualPath; |
| } |
| |
| public final AtomicBoolean isIdle() { |
| return idle; |
| } |
| |
| /** |
| * Idle check background task |
| */ |
| private final class IdleCheck implements Runnable { |
| |
| private final SplitStrategy strategy; |
| |
| private IdleCheck(SplitStrategy strategy) { |
| this.strategy = strategy; |
| } |
| |
| @Override |
| public void run() { |
| HdfsProducer.this.log.trace("IdleCheck running"); |
| |
| if (System.currentTimeMillis() - ostream.getLastAccess() > strategy.value && !idle.get() && !ostream.isBusy().get()) { |
| idle.set(true); |
| try { |
| ostream.close(); |
| } catch (IOException e) { |
| // ignore |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "IdleCheck"; |
| } |
| } |
| } |
| |