| 1 |
|
|
| 2 |
|
|
| 3 |
|
|
| 4 |
|
|
| 5 |
|
|
| 6 |
|
|
| 7 |
|
|
| 8 |
|
|
| 9 |
|
|
| 10 |
|
|
| 11 |
|
|
| 12 |
|
|
| 13 |
|
|
| 14 |
|
|
| 15 |
|
|
| 16 |
|
|
| 17 |
|
|
| 18 |
|
package org.apache.camel.processor; |
| 19 |
|
|
| 20 |
|
import org.apache.camel.Endpoint; |
| 21 |
|
import org.apache.camel.Exchange; |
| 22 |
|
import org.apache.camel.Expression; |
| 23 |
|
import org.apache.camel.PollingConsumer; |
| 24 |
|
import org.apache.camel.Processor; |
| 25 |
|
import org.apache.camel.impl.LoggingExceptionHandler; |
| 26 |
|
import org.apache.camel.impl.ServiceSupport; |
| 27 |
|
import org.apache.camel.spi.ExceptionHandler; |
| 28 |
|
import org.apache.camel.util.ExpressionComparator; |
| 29 |
|
import org.apache.camel.util.ExpressionListComparator; |
| 30 |
|
import org.apache.camel.util.ServiceHelper; |
| 31 |
|
import org.apache.commons.logging.Log; |
| 32 |
|
import org.apache.commons.logging.LogFactory; |
| 33 |
|
|
| 34 |
|
import java.util.Comparator; |
| 35 |
|
import java.util.Iterator; |
| 36 |
|
import java.util.List; |
| 37 |
|
import java.util.Set; |
| 38 |
|
import java.util.TreeSet; |
| 39 |
|
|
| 40 |
|
|
| 41 |
|
|
| 42 |
|
|
| 43 |
|
|
| 44 |
|
|
| 45 |
|
public class Resequencer extends ServiceSupport implements Runnable { |
| 46 |
1 |
private static final transient Log log = LogFactory.getLog(Resequencer.class); |
| 47 |
|
private Endpoint endpoint; |
| 48 |
|
private Processor processor; |
| 49 |
|
private Set<Exchange> set; |
| 50 |
1 |
private long batchTimeout = 1000L; |
| 51 |
1 |
private int batchSize = 100; |
| 52 |
|
private PollingConsumer consumer; |
| 53 |
|
private ExceptionHandler exceptionHandler; |
| 54 |
|
|
| 55 |
|
public Resequencer(Endpoint endpoint, Processor processor, Expression<Exchange> expression) { |
| 56 |
0 |
this(endpoint, processor, createSet(expression)); |
| 57 |
0 |
} |
| 58 |
|
|
| 59 |
|
public Resequencer(Endpoint endpoint, Processor processor, List<Expression<Exchange>> expressions) { |
| 60 |
1 |
this(endpoint, processor, createSet(expressions)); |
| 61 |
1 |
} |
| 62 |
|
|
| 63 |
1 |
public Resequencer(Endpoint endpoint, Processor processor, Set<Exchange> set) { |
| 64 |
1 |
this.endpoint = endpoint; |
| 65 |
1 |
this.processor = processor; |
| 66 |
1 |
this.set = set; |
| 67 |
1 |
} |
| 68 |
|
|
| 69 |
|
@Override |
| 70 |
|
public String toString() { |
| 71 |
2 |
return "Resequencer[to: " + processor + "]"; |
| 72 |
|
} |
| 73 |
|
|
| 74 |
|
public void run() { |
| 75 |
1 |
log.debug("Starting thread for " + this); |
| 76 |
3 |
while (!isStopped() && !isStopping()) { |
| 77 |
|
try { |
| 78 |
2 |
processBatch(); |
| 79 |
|
} |
| 80 |
0 |
catch (Exception e) { |
| 81 |
0 |
getExceptionHandler().handleException(e); |
| 82 |
2 |
} |
| 83 |
0 |
} |
| 84 |
1 |
set.clear(); |
| 85 |
1 |
} |
| 86 |
|
|
| 87 |
|
|
| 88 |
|
|
| 89 |
|
public ExceptionHandler getExceptionHandler() { |
| 90 |
0 |
if (exceptionHandler == null) { |
| 91 |
0 |
exceptionHandler = new LoggingExceptionHandler(getClass()); |
| 92 |
|
} |
| 93 |
0 |
return exceptionHandler; |
| 94 |
|
} |
| 95 |
|
|
| 96 |
|
public void setExceptionHandler(ExceptionHandler exceptionHandler) { |
| 97 |
0 |
this.exceptionHandler = exceptionHandler; |
| 98 |
0 |
} |
| 99 |
|
|
| 100 |
|
public int getBatchSize() { |
| 101 |
0 |
return batchSize; |
| 102 |
|
} |
| 103 |
|
|
| 104 |
|
public void setBatchSize(int batchSize) { |
| 105 |
0 |
this.batchSize = batchSize; |
| 106 |
0 |
} |
| 107 |
|
|
| 108 |
|
public long getBatchTimeout() { |
| 109 |
0 |
return batchTimeout; |
| 110 |
|
} |
| 111 |
|
|
| 112 |
|
public void setBatchTimeout(long batchTimeout) { |
| 113 |
0 |
this.batchTimeout = batchTimeout; |
| 114 |
0 |
} |
| 115 |
|
|
| 116 |
|
|
| 117 |
|
|
| 118 |
|
|
| 119 |
|
|
| 120 |
|
|
| 121 |
|
|
| 122 |
|
|
| 123 |
|
protected synchronized void processBatch() throws Exception { |
| 124 |
2 |
long start = System.currentTimeMillis(); |
| 125 |
2 |
long end = start + batchTimeout; |
| 126 |
6 |
for (int i = 0; i < batchSize; i++) { |
| 127 |
6 |
long timeout = end - System.currentTimeMillis(); |
| 128 |
|
|
| 129 |
6 |
Exchange exchange = consumer.receive(timeout); |
| 130 |
6 |
if (exchange == null) { |
| 131 |
2 |
break; |
| 132 |
|
} |
| 133 |
4 |
set.add(exchange); |
| 134 |
|
} |
| 135 |
|
|
| 136 |
2 |
if (log.isDebugEnabled()) { |
| 137 |
0 |
log.debug("Finsihed batch size: " + batchSize + " timeout: " + batchTimeout + " so sending set: " + set); |
| 138 |
|
} |
| 139 |
|
|
| 140 |
|
|
| 141 |
2 |
Iterator<Exchange> iter = set.iterator(); |
| 142 |
6 |
while (iter.hasNext()) { |
| 143 |
4 |
Exchange exchange = iter.next(); |
| 144 |
4 |
iter.remove(); |
| 145 |
4 |
processor.process(exchange); |
| 146 |
4 |
} |
| 147 |
2 |
} |
| 148 |
|
|
| 149 |
|
protected void doStart() throws Exception { |
| 150 |
1 |
consumer = endpoint.createPollingConsumer(); |
| 151 |
|
|
| 152 |
1 |
ServiceHelper.startServices(processor, consumer); |
| 153 |
|
|
| 154 |
1 |
Thread thread = new Thread(this, this + " Polling Thread"); |
| 155 |
1 |
thread.start(); |
| 156 |
1 |
} |
| 157 |
|
|
| 158 |
|
protected void doStop() throws Exception { |
| 159 |
1 |
ServiceHelper.stopServices(consumer, processor); |
| 160 |
1 |
consumer = null; |
| 161 |
1 |
} |
| 162 |
|
|
| 163 |
|
protected static Set<Exchange> createSet(Expression<Exchange> expression) { |
| 164 |
1 |
return createSet(new ExpressionComparator<Exchange>(expression)); |
| 165 |
|
} |
| 166 |
|
|
| 167 |
|
protected static Set<Exchange> createSet(List<Expression<Exchange>> expressions) { |
| 168 |
1 |
if (expressions.size() == 1) { |
| 169 |
1 |
return createSet(expressions.get(0)); |
| 170 |
|
} |
| 171 |
0 |
return createSet(new ExpressionListComparator<Exchange>(expressions)); |
| 172 |
|
} |
| 173 |
|
|
| 174 |
|
protected static Set<Exchange> createSet(Comparator<? super Exchange> comparator) { |
| 175 |
1 |
return new TreeSet<Exchange>(comparator); |
| 176 |
|
} |
| 177 |
|
} |