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/*
Derby - Class org.apache.derbyTesting.functionTests.store.OnlineBackup
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.derbyTesting.functionTests.tests.store;
import java.sql.Connection;
import java.sql.CallableStatement;
import java.sql.SQLException;
import org.apache.derbyTesting.functionTests.util.TestUtil;
/**
* This class provides functionalty for tests to perform
* online backup in a separate thread. And functions to
* create/restore/rollforard recovery from the backup.
*
* @version 1.0
*/
public class OnlineBackup implements Runnable{
private String dbName; // name of the database to backup
private boolean beginBackup = false;
private boolean endBackup = false;
private boolean backupFailed = false;
private Throwable backupError = null;
private String backupPath;
OnlineBackup(String dbName, String backupPath) {
this.dbName = dbName;
this.backupPath = backupPath;
}
/**
* implementation of run() method in the Runnable interface, which
* is invoked when a thread is started using this class object.
*
* Performs online backup.
*
*/
public void run() {
backupFailed = false;
try {
performBackup();
} catch (Throwable error) {
synchronized(this) {
// inform threads that may be waiting for backup to
// start/end that it failed.
backupFailed = true;
backupError = error;
notifyAll();
}
org.apache.derby.tools.JDBCDisplayUtil.ShowException(System.out, error);
error.printStackTrace(System.out);
}
}
/**
* Backup the database
*/
void performBackup() throws SQLException {
Connection conn = TestUtil.getConnection(dbName , "");
CallableStatement backupStmt =
conn.prepareCall("CALL SYSCS_UTIL.SYSCS_BACKUP_DATABASE(?)");
backupStmt.setString(1, backupPath);
synchronized(this) {
beginBackup = true;
endBackup = false;
notifyAll();
}
backupStmt.execute();
backupStmt.close();
conn.close();
synchronized(this) {
beginBackup = false;
endBackup = true;
notifyAll();
}
}
/**
* Wait for the backup to start.
*/
public void waitForBackupToBegin() throws Exception{
synchronized(this) {
//wait for backup to begin
while (!beginBackup) {
// if the backup failed for some reason throw error, don't go
// into wait state.
if (backupFailed)
throw new Exception("BACKUP FAILED:" +
backupError.getMessage());
else
wait();
}
}
}
/*
* Wait for the backup to finish.
*/
public void waitForBackupToEnd() throws Exception{
synchronized(this) {
if (!endBackup) {
// check if a backup has actually started by the test
if (!beginBackup) {
System.out.println("BACKUP IS NOT STARTED BY THE TEST YET");
} else {
//wait for backup to finish
while (!endBackup)
{
// if the backup failed for some reason throw error, don't go
// into wait state.
if (backupFailed)
throw new Exception("BACKUP FAILED:" +
backupError.getMessage());
else
wait();
}
}
}
}
}
/**
* Check if backup is running ?
* @return <tt>true</tt> if backup is running.
* <tt>false</tt> otherwise.
*/
public synchronized boolean isRunning() {
return beginBackup;
}
/**
* Create a new database from the backup copy taken earlier.
* @param newDbName name of the database to be created.
*/
public void createFromBackup(String newDbName) throws SQLException {
Connection conn = TestUtil.getConnection(newDbName,
"createFrom=" +
backupPath + "/" +
dbName);
conn.close();
}
/**
* Restore the database from the backup copy taken earlier.
*/
public void restoreFromBackup() throws SQLException {
Connection conn = TestUtil.getConnection(dbName,
"restoreFrom=" +
backupPath + "/" +
dbName);
conn.close();
}
}
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