/*
* Copyright 1998-2002 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @summary sanity test for log sudden-death and recovery
* @run ignore Requires special hooks in ReliableLog not yet putback.
*/
/* The ReliableLog uses three filenames and renaming to effect atomic
* versionFile updates. First, a newVersionFile (an intention list)
* is written. Next, the current versionFile is renamed to an
* oldVersionFile (an undo list). Finally, the newVersionFile is
* renamed to the current versionFile, and the undo list is discarded.
* If the current version file does not exist on restart, then
* stability can always be restored by reading the oldVersionFile.
*
* This test uses little conditional bombs. When a switch is flipped
* in ReliableLog, the code will abort with an InternalError at a
* particular point. We then pretend to have come up from scratch and
* recover from the bombed situation.
*/
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.io.Serializable;
import sun.rmi.log.LogHandler;
import sun.rmi.log.ReliableLog;
//import javasoft.sqe.harness.Status;
//import javasoft.sqe.harness.Test;
public class Recovery
extends LogHandler
implements Serializable //, Test
{
static private final String dir = "./recovery_tmp";
static public void main (String[] argv)
{
Recovery test = new Recovery();
//Status status = test.run (argv, System.err, System.out);
//status.exit();
test.run (argv, System.err, System.out);
}
//public Status run (String argv[], PrintStream log, PrintStream out)
public void run (String argv[], PrintStream lg, PrintStream out)
{
try {
int size;
int deathpoint;
for (size = 1; size < 256; size *= 2) {
for (deathpoint = 0; deathpoint <= 8; deathpoint++) {
// Trash the log directory
try {
(new File(dir,"Version_Number")).delete();
} catch (Exception e) {
}
try {
(new File(dir,"New_Version_Number")).delete();
} catch (Exception e) {
}
try {
(new File(dir,"Old_Version_Number")).delete();
} catch (Exception e) {
}
Recovery handler = new Recovery();
ReliableLog log;
if (size == 4 && deathpoint == 6) {
Runtime.getRuntime().traceMethodCalls(true);
}
log = new ReliableLog(dir, handler);
if (size == 4 && deathpoint == 6) {
Runtime.getRuntime().traceMethodCalls(false);
}
// Generate a number of updates (size - 1) until failing
int i;
StringBuffer writ = new StringBuffer();
char[] u = new char[1];
for (i = 1; i < size; i++) {
u[0] = (char)(64 + (i % 26));
String update = new String(u);
handler.basicUpdate(update);
log.update(update, true);
writ.append(update);
}
// Fail
String f = ("FALL" + deathpoint);
boolean failed_as_desired = false;
try {
ReliableLog.fallOverPoint = deathpoint;
handler.basicUpdate(f);
log.update(f, true);
log.snapshot(handler);
} catch (InternalError e) {
if (!e.getMessage().equals(f))
throw e; // oops, not ours
failed_as_desired = true;
} finally {
ReliableLog.fallOverPoint = 0;
try {
log.close();
} catch (IOException ign) {
}
}
// deathpoint == 0 means that there is no deathpoint and we are testing
// undisastered behaviour.
if (!failed_as_desired && deathpoint != 0) {
System.err.println ("sun.rmi.log.ReliableLog is not instrumented for" +
" this test; test skipped");
return;
}
// Now try to recover.
Recovery laz = new Recovery();
ReliableLog carbon = new ReliableLog(dir, laz);
Recovery thingy;
thingy = (Recovery)carbon.recover();
try {
carbon.close();
} catch (IOException ign) {
}
// Recovered thingy must be equal to writ or to writ + f, but nothing
// else (or in between).
String recovered = thingy.contents;
String sacr = writ.toString();
if (recovered.length() == sacr.length()
&& recovered.compareTo(sacr) == 0)
{
lg.println("Passed test " + size + "/" + deathpoint
+ ": rolled back to v1");
} else if (recovered.length() == (sacr.length() + f.length())
&& recovered.compareTo(sacr + f) == 0)
{
lg.println("Passed test " + size + "/" + deathpoint
+ ": committed to v2");
} else {
final String q = "\"";
lg.println("Wrote " + sacr.length() + ": " + q + sacr + q);
lg.println("Simulated failure during write "
+ f.length() + ": " + q + f + q);
lg.println("Recovered " + recovered.length() + ": " + q + recovered + q);
throw new InternalError("Failed test " + size + "/" + deathpoint
+ " (size/deathpoint):");
}
}
}
} catch (Exception e) {
e.printStackTrace(lg);
//return (Status.failed
throw (new RuntimeException
("Exception in sanity test for sun.rmi.log.ReliableLog"));
}
//return (Status.passed ("OKAY"));
}
private String contents;
transient private StringBuffer trc = null;
public Recovery()
{
super();
if (this.contents == null)
this.contents = "?";
}
// implements LogHandler.initialSnapshot()
public Object initialSnapshot()
throws Exception
{
this.contents = "";
return (this);
}
// implements LogHandler.applyUpdate()
public Object applyUpdate (Object update, Object state)
throws Exception
{
// basicUpdate appends the string
((Recovery)state).basicUpdate ((String)update);
return (state);
}
// an "update" is a short string to append to this.contents (must ignore state)
public void basicUpdate (String extra)
{
this.contents = this.contents + extra;
}
}