1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* 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 static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import org.apache.jute.Record;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.PortAssignment;
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.TxnLogEntry;
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.jupiter.api.Test;
/**
* Test loading committed proposal from txnlog. Learner uses these proposals to
* catch-up with leader
*/
public class GetProposalFromTxnTest extends ZKTestCase {
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);
assertTrue(ClientBase.waitForServerUp(HOSTPORT, CONNECTION_TIMEOUT), "waiting for server being up ");
ZooKeeper zk = ClientBase.createZKClient(HOSTPORT);
// 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();
assertTrue(ClientBase.waitForServerDown(HOSTPORT, CONNECTION_TIMEOUT), "waiting for server to shutdown");
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();
TxnLogEntry logEntry = SerializeUtils.deserializeTxn(
proposal.packet.getData());
TxnHeader hdr = logEntry.getHeader();
Record rec = logEntry.getTxn();
if (hdr.getType() == OpCode.create) {
retrievedZxids.add(hdr.getZxid());
createCount++;
}
}
// All zxid should match what we created
assertTrue(Arrays.equals(zxids, retrievedZxids.toArray(new Long[0])), "Zxids missmatches");
// There should be 2000 create requests
assertTrue((createCount == MSG_COUNT), "create proposal count == " + 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);
assertFalse((itr.hasNext()), "Expect empty proposal");
f.shutdown();
zks.shutdown();
}
}
|
