/**
* 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.zookeeper.test;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import org.apache.jute.Record;
import org.apache.log4j.Logger;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.PortAssignment;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZKTestCase;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooDefs.OpCode;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.apache.zookeeper.server.ServerCnxnFactory;
import org.apache.zookeeper.server.SyncRequestProcessor;
import org.apache.zookeeper.server.ZKDatabase;
import org.apache.zookeeper.server.ZooKeeperServer;
import org.apache.zookeeper.server.quorum.Leader.Proposal;
import org.apache.zookeeper.server.util.SerializeUtils;
import org.apache.zookeeper.txn.TxnHeader;
import org.junit.Assert;
import org.junit.Test;
/**
* Test loading committed proposal from txnlog. Learner uses these proposals to
* catch-up with leader
*/
public class GetProposalFromTxnTest extends ZKTestCase implements Watcher {
private static final Logger LOG = Logger
.getLogger(GetProposalFromTxnTest.class);
private static String HOSTPORT = "127.0.0.1:" + PortAssignment.unique();
private static final int CONNECTION_TIMEOUT = 3000;
private static final int MSG_COUNT = 2000;
/**
* Test loading proposal from txnlog
*
* @throws Exception
* an exception might be thrown here
*/
@Test
public void testGetProposalFromTxn() throws Exception {
File tmpDir = ClientBase.createTmpDir();
ClientBase.setupTestEnv();
ZooKeeperServer zks = new ZooKeeperServer(tmpDir, tmpDir, 3000);
SyncRequestProcessor.setSnapCount(100);
final int PORT = Integer.parseInt(HOSTPORT.split(":")[1]);
ServerCnxnFactory f = ServerCnxnFactory.createFactory(PORT, -1);
f.startup(zks);
Assert.assertTrue("waiting for server being up ",
ClientBase.waitForServerUp(HOSTPORT, CONNECTION_TIMEOUT));
ZooKeeper zk = new ZooKeeper(HOSTPORT, CONNECTION_TIMEOUT, this);
// Generate transaction so we will have some txnlog
Long[] zxids = new Long[MSG_COUNT];
try {
String data = "data";
byte[] bytes = data.getBytes();
for (int i = 0; i < MSG_COUNT; i++) {
Stat stat = new Stat();
zk.create("/invalidsnap-" + i, bytes, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
zk.getData("/invalidsnap-" + i, null, stat);
zxids[i] = stat.getCzxid();
}
} finally {
zk.close();
}
// shutdown and start zookeeper again
f.shutdown();
zks.shutdown();
Assert.assertTrue("waiting for server to shutdown",
ClientBase.waitForServerDown(HOSTPORT, CONNECTION_TIMEOUT));
zks = new ZooKeeperServer(tmpDir, tmpDir, 3000);
zks.startdata();
ZKDatabase db = zks.getZKDatabase();
// Set sizeLimit to be very high number, so we can pull all transactions
// from txnlog
Iterator<Proposal> itr = db.getProposalsFromTxnLog(zxids[0], 10000000);
int createCount = 0;
ArrayList<Long> retrievedZxids = new ArrayList<Long>(MSG_COUNT);
// Get zxid of create requests
while (itr.hasNext()) {
Proposal proposal = itr.next();
TxnHeader hdr = new TxnHeader();
Record rec = SerializeUtils.deserializeTxn(
proposal.packet.getData(), hdr);
if (hdr.getType() == OpCode.create) {
retrievedZxids.add(hdr.getZxid());
createCount++;
}
}
// All zxid should match what we created
Assert.assertTrue("Zxids missmatches",
Arrays.equals(zxids, retrievedZxids.toArray(new Long[0])));
// There should be 2000 create requests
Assert.assertTrue("create proposal count == " + MSG_COUNT,
(createCount == MSG_COUNT));
// We are requesting half the number of transaction from the snapshot
// this should exceed threshold (ZKDatabase.snapshotSizeFactor)
db.setSnapshotSizeFactor(0.33);
long sizeLimit = db.calculateTxnLogSizeLimit();
itr = db.getProposalsFromTxnLog(zxids[MSG_COUNT / 2], sizeLimit);
Assert.assertFalse("Expect empty proposal", (itr.hasNext()));
f.shutdown();
zks.shutdown();
}
public void process(WatchedEvent event) {
// do nothing
}
}