/*
* 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.flume.channel;
import org.apache.flume.Channel;
import org.apache.flume.Context;
import org.apache.flume.Event;
import org.apache.flume.EventDeliveryException;
import org.apache.flume.Transaction;
import org.apache.flume.conf.Configurables;
import org.apache.flume.event.EventBuilder;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
public class TestMemoryChannelTransaction {
private Channel channel;
@Before
public void setUp() {
channel = new MemoryChannel();
}
@Test
public void testCommit() throws InterruptedException, EventDeliveryException {
Event event, event2;
Context context = new Context();
int putCounter = 0;
context.put("keep-alive", "1");
context.put("capacity", "100");
context.put("transactionCapacity", "50");
Configurables.configure(channel, context);
Transaction transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
transaction.begin();
for (putCounter = 0; putCounter < 10; putCounter++) {
event = EventBuilder.withBody(("test event" + putCounter).getBytes());
channel.put(event);
}
transaction.commit();
transaction.close();
transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
transaction = channel.getTransaction();
transaction.begin();
for (int i = 0; i < 10; i++) {
event2 = channel.take();
Assert.assertNotNull("lost an event", event2);
Assert.assertArrayEquals(event2.getBody(), ("test event" + i).getBytes());
// System.out.println(event2.toString());
}
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.commit();
transaction.close();
}
@Test
public void testRollBack() throws InterruptedException,
EventDeliveryException {
Event event, event2;
Context context = new Context();
int putCounter = 0;
context.put("keep-alive", "1");
Configurables.configure(channel, context);
Transaction transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
// add events and rollback txn
transaction.begin();
for (putCounter = 0; putCounter < 10; putCounter++) {
event = EventBuilder.withBody(("test event" + putCounter).getBytes());
channel.put(event);
}
transaction.rollback();
transaction.close();
// verify that no events are stored due to rollback
transaction = channel.getTransaction();
transaction.begin();
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.commit();
transaction.close();
// add events and commit
transaction = channel.getTransaction();
transaction.begin();
for (putCounter = 0; putCounter < 10; putCounter++) {
event = EventBuilder.withBody(("test event" + putCounter).getBytes());
channel.put(event);
}
transaction.commit();
transaction.close();
transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
// verify events are there, then rollback the take
transaction.begin();
for (int i = 0; i < 10; i++) {
event2 = channel.take();
Assert.assertNotNull("lost an event", event2);
Assert.assertArrayEquals(event2.getBody(), ("test event" + i).getBytes());
}
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.rollback();
transaction.close();
// verify that the events were left in there due to rollback
transaction = channel.getTransaction();
transaction.begin();
for (int i = 0; i < 10; i++) {
event2 = channel.take();
Assert.assertNotNull("lost an event", event2);
Assert.assertArrayEquals(event2.getBody(), ("test event" + i).getBytes());
}
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.rollback();
transaction.close();
}
@Ignore("BasicChannelSemantics doesn't support re-entrant transactions")
@Test
public void testReEntTxn() throws InterruptedException,
EventDeliveryException {
Event event, event2;
Context context = new Context();
int putCounter = 0;
context.put("keep-alive", "1");
Configurables.configure(channel, context);
Transaction transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
transaction.begin(); // first begin
for (putCounter = 0; putCounter < 10; putCounter++) {
transaction.begin(); // inner begin
event = EventBuilder.withBody(("test event" + putCounter).getBytes());
channel.put(event);
transaction.commit(); // inner commit
}
transaction.commit();
transaction.close();
transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
transaction.begin();
for (int i = 0; i < 10; i++) {
event2 = channel.take();
Assert.assertNotNull("lost an event", event2);
Assert.assertArrayEquals(event2.getBody(), ("test event" + i).getBytes());
// System.out.println(event2.toString());
}
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.commit();
transaction.close();
}
@Ignore("BasicChannelSemantics doesn't support re-entrant transactions")
@Test
public void testReEntTxnRollBack() throws InterruptedException,
EventDeliveryException {
Event event, event2;
Context context = new Context();
int putCounter = 0;
context.put("keep-alive", "1");
Configurables.configure(channel, context);
Transaction transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
// add events and rollback txn
transaction.begin();
for (putCounter = 0; putCounter < 10; putCounter++) {
event = EventBuilder.withBody(("test event" + putCounter).getBytes());
channel.put(event);
}
transaction.rollback();
transaction.close();
// verify that no events are stored due to rollback
transaction = channel.getTransaction();
transaction.begin();
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.commit();
transaction.close();
// add events and commit
transaction = channel.getTransaction();
transaction.begin();
for (putCounter = 0; putCounter < 10; putCounter++) {
event = EventBuilder.withBody(("test event" + putCounter).getBytes());
channel.put(event);
}
transaction.commit();
transaction.close();
transaction = channel.getTransaction();
Assert.assertNotNull(transaction);
// verify events are there, then rollback the take
transaction.begin();
for (int i = 0; i < 10; i++) {
transaction.begin(); // inner begin
event2 = channel.take();
Assert.assertNotNull("lost an event", event2);
Assert.assertArrayEquals(event2.getBody(), ("test event" + i).getBytes());
transaction.commit(); // inner commit
}
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.rollback();
transaction.close();
// verify that the events were left in there due to rollback
transaction = channel.getTransaction();
transaction.begin();
for (int i = 0; i < 10; i++) {
event2 = channel.take();
Assert.assertNotNull("lost an event", event2);
Assert.assertArrayEquals(event2.getBody(), ("test event" + i).getBytes());
}
event2 = channel.take();
Assert.assertNull("extra event found", event2);
transaction.rollback();
transaction.close();
}
}