com.sleepycat.je.rep.utilint

Class DbSync

java.lang.Object

com.sleepycat.je.rep.utilint.DbSync

public class DbSync
extends Object

DbSync is a utility for ensuring that a group of replication nodes have fully caught up on the replication stream. The target use case is testing. If a replication group has crashed abruptly, nodes may have closed without finishing the full replay of the replication stream and the environments might not have the same contents. This makes it impossible to compare the contents of the environments for correctness.

DbSync assumes that all nodes are down. The utility is invoked for each node in the group. The node will come up and rejoin the group, causing the whole group to reach the same point in the replication stream. If the node becomes the master, it will issue a shutdown request. Otherwise, a node is a replica, and will wait for the shutdown message to come, and will then close.

Field Summary

Fields

Modifier and Type	Field and Description
static String	DBSYNC_ENV
static String	DBSYNC_GROUP_NAME
static String	DBSYNC_HELPER_HOST
static String	DBSYNC_NET_PROPS
static String	DBSYNC_NODE_HOST
static String	DBSYNC_NODE_NAME
static String	DBSYNC_TIMEOUT

Constructor Summary

Constructors

Constructor and Description
DbSync(String envHome, EnvironmentConfig envConfig, ReplicationConfig repConfig, String helperHost, long timeout) Create a DbSync object for the purposed of syncing up a specific replication group.

Method Summary

Modifier and Type	Method and Description
static void	main(String[] args)
void	sync() Open this replication node.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DBSYNC_ENV

public static final String DBSYNC_ENV

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Constant Field Values

DBSYNC_GROUP_NAME

public static final String DBSYNC_GROUP_NAME

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Constant Field Values

DBSYNC_NODE_NAME

public static final String DBSYNC_NODE_NAME

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Constant Field Values

DBSYNC_NODE_HOST

public static final String DBSYNC_NODE_HOST

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Constant Field Values

DBSYNC_HELPER_HOST

public static final String DBSYNC_HELPER_HOST

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Constant Field Values

DBSYNC_TIMEOUT

public static final String DBSYNC_TIMEOUT

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Constant Field Values

DBSYNC_NET_PROPS

public static final String DBSYNC_NET_PROPS

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Constant Field Values

Constructor Detail

DbSync

public DbSync(String envHome,
              EnvironmentConfig envConfig,
              ReplicationConfig repConfig,
              String helperHost,
              long timeout)

Create a DbSync object for the purposed of syncing up a specific replication group.

Parameters:

envHome - The Environment home directories of this replica.

helperHost - The helper host for this replica.

timeout - The permitted time period, in milliseconds, for the replica to catch up with master.

Method Detail

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception

sync

public void sync()
          throws Exception

Open this replication node. Block until the node has opened, synced up, and closed.

Throws:

Exception