Author: markt
Date: Wed Apr 1 17:07:47 2015
New Revision: 1670731
URL: http://svn.apache.org/r1670731
Log:
Fix https://bz.apache.org/bugzilla/show_bug.cgi?id=57772
When reloading an application and a DIR representing an expanded WAR needs to
be deleted ensure that the DIR is deleted after the context has been stopped
rather than before.
Modified:
tomcat/tc8.0.x/trunk/ (props changed)
tomcat/tc8.0.x/trunk/java/org/apache/catalina/startup/HostConfig.java
tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml
Propchange: tomcat/tc8.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Wed Apr 1 17:07:47 2015
@@ -1 +1 @@
-/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
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+/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
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Modified: tomcat/tc8.0.x/trunk/java/org/apache/catalina/startup/HostConfig.java
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/catalina/startup/HostConfig.java?rev=1670731&r1=1670730&r2=1670731&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/java/org/apache/catalina/startup/HostConfig.java
(original)
+++ tomcat/tc8.0.x/trunk/java/org/apache/catalina/startup/HostConfig.java Wed
Apr 1 17:07:47 2015
@@ -1268,12 +1268,10 @@ public class HostConfig
docBaseFile = new File(host.getAppBaseFile(),
docBase);
}
- ExpandWar.delete(docBaseFile);
- // Reset the docBase to trigger re-expansion of the
- // WAR
- context.setDocBase(resource.getAbsolutePath());
+ reload(app, docBaseFile,
resource.getAbsolutePath());
+ } else {
+ reload(app, null, null);
}
- reload(app);
// Update times
app.redeployResources.put(resources[i],
Long.valueOf(resource.lastModified()));
@@ -1335,7 +1333,7 @@ public class HostConfig
update) {
if (!update) {
// Reload application
- reload(app);
+ reload(app, null, null);
update = true;
}
// Update times. More than one file may have been updated. We
@@ -1348,16 +1346,28 @@ public class HostConfig
}
- private void reload(DeployedApplication app) {
+ /*
+ * Note: If either of fileToRemove and newDocBase are null, both will be
+ * ignored.
+ */
+ private void reload(DeployedApplication app, File fileToRemove, String
newDocBase) {
if(log.isInfoEnabled())
log.info(sm.getString("hostConfig.reload", app.name));
Context context = (Context) host.findChild(app.name);
if (context.getState().isAvailable()) {
+ if (fileToRemove != null && newDocBase != null) {
+ context.addLifecycleListener(
+ new ExpandedDirectoryRemovalListener(fileToRemove,
newDocBase));
+ }
// Reload catches and logs exceptions
context.reload();
} else {
// If the context was not started (for example an error
// in web.xml) we'll still get to try to start
+ if (fileToRemove != null && newDocBase != null) {
+ ExpandWar.delete(fileToRemove);
+ context.setDocBase(newDocBase);
+ }
try {
context.start();
} catch (Exception e) {
@@ -1776,4 +1786,54 @@ public class HostConfig
config.deployDirectory(cn, dir);
}
}
+
+
+ /*
+ * The purpose of this class is to provide a way for HostConfig to get
+ * a Context to delete an expanded WAR after the Context stops. This is to
+ * resolve this issue described in Bug 57772. The alternative solutions
+ * require either duplicating a lot of the Context.reload() code in
+ * HostConfig or adding a new reload(boolean) method to Context that allows
+ * the caller to optionally delete any expanded WAR.
+ *
+ * The LifecycleListener approach offers greater flexibility and enables
the
+ * behaviour to be changed / extended / removed in future without changing
+ * the Context API.
+ */
+ private static class ExpandedDirectoryRemovalListener implements
LifecycleListener {
+
+ private final File toDelete;
+ private final String newDocBase;
+
+ /**
+ * Create a listener that will ensure that any expanded WAR is removed
+ * and the docBase set to the specified WAR.
+ *
+ * @param toDelete The file (a directory representing an expanded WAR)
+ * to be deleted
+ * @param newDocBase The new docBase for the Context
+ */
+ public ExpandedDirectoryRemovalListener(File toDelete, String
newDocBase) {
+ this.toDelete = toDelete;
+ this.newDocBase = newDocBase;
+ }
+
+ @Override
+ public void lifecycleEvent(LifecycleEvent event) {
+ if (event.getType() == Lifecycle.AFTER_STOP_EVENT) {
+ // The context has stopped.
+ Context context = (Context) event.getLifecycle();
+
+ // Remove the old expanded WAR.
+ ExpandWar.delete(toDelete);
+
+ // Reset the docBase to trigger re-expansion of the WAR.
+ context.setDocBase(newDocBase);
+
+ // Remove this listener from the Context else it will run every
+ // time the Context is stopped.
+ context.removeLifecycleListener(this);
+ }
+ }
+ }
}
Modified: tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml?rev=1670731&r1=1670730&r2=1670731&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml Wed Apr 1 17:07:47 2015
@@ -83,6 +83,12 @@
messages that do not give any valuable information. Patch provided
by Polina Genova. (violetagg)
</fix>
+ <fix>
+ <bug>57772</bug>: When reloading a web application and a directory
+ representing an expanded WAR needs to be deleted, delete the directory
+ after the web application has been stopped rather than before to avoid
+ potential ClassNotFoundExceptions. (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Coyote">
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