/**
* Doing the start, stop, reload and lazy unload of webapps inside all hosts respectively when
* getting request.
*
* @param nameOfOperation the operation to be performed in oder to hot update the host
* @throws CarbonException if errors occurs when hot update the host
*/
private void handleHotUpdateToHost(String nameOfOperation) throws CarbonException {
if (DataHolder.getHotUpdateService() != null) {
List<String> mappings =
URLMappingHolder.getInstance().getUrlMappingsPerApplication(this.context.getName());
Engine engine = DataHolder.getCarbonTomcatService().getTomcat().getEngine();
Context hostContext;
Host host;
for (String hostName : mappings) {
host = (Host) engine.findChild(hostName);
if (host != null) {
hostContext = (Context) host.findChild("/");
if (hostContext != null) {
if (nameOfOperation.equalsIgnoreCase("start")) {
start(hostContext);
} else if (nameOfOperation.equalsIgnoreCase("stop")) {
stop(hostContext);
} else if (nameOfOperation.equalsIgnoreCase("reload")) {
reload(hostContext);
} else if (nameOfOperation.equalsIgnoreCase("lazyunload")) {
lazyUnload(hostContext);
DataHolder.getHotUpdateService().removeHost(hostName);
} else if (nameOfOperation.equalsIgnoreCase("delete")) {
DataHolder.getHotUpdateService().deleteHost(hostName);
}
}
}
}
}
}
public void deploy(String url, File dir) {
if (host.findChild(url) != null) return;
if (dir == null || !dir.exists() || !dir.isDirectory()) return;
log.debug("deploy new context:" + url + ", dir:" + dir.getAbsolutePath());
this.host.addChild(this.embedded.createContext(url, dir.getAbsolutePath()));
}
/** Undeploy all deployed applications. */
protected void undeployApps() {
if (log.isDebugEnabled()) log.debug(sm.getString("hostConfig.undeploying"));
// Soft undeploy all contexts we have deployed
DeployedApplication[] apps =
(DeployedApplication[]) deployed.values().toArray(new DeployedApplication[0]);
for (int i = 0; i < apps.length; i++) {
try {
host.removeChild(host.findChild(apps[i].name));
} catch (Throwable t) {
log.warn(sm.getString("hostConfig.context.remove", apps[i].name), t);
}
}
deployed.clear();
}
@Override
public synchronized void start() throws Exception {
Host host = ServerUtil.getDefaultHost().getHost();
_serverContext = (StandardContext) host.findChild("/" + _contextName);
if (_serverContext == null) {
_serverContext = new StandardContext();
_serverContext.setPath("/" + _contextName);
File docBase = new File(SERVER_TEMP_DIR, _contextName);
if (!docBase.exists()) {
if (!docBase.mkdirs()) {
throw new RuntimeException("Unable to create temp directory " + docBase.getPath());
}
}
_serverContext.setDocBase(docBase.getPath());
_serverContext.addLifecycleListener(new ContextConfig());
final Loader loader = new WebCtxLoader(Thread.currentThread().getContextClassLoader());
loader.setContainer(host);
_serverContext.setLoader(loader);
_serverContext.setInstanceManager(new LocalInstanceManager());
Wrapper wrapper = _serverContext.createWrapper();
wrapper.setName(SERVLET_NAME);
wrapper.setServletClass(SwitchYardRemotingServlet.class.getName());
wrapper.setLoadOnStartup(1);
_serverContext.addChild(wrapper);
_serverContext.addServletMapping("/*", SERVLET_NAME);
host.addChild(_serverContext);
_serverContext.create();
_serverContext.start();
SwitchYardRemotingServlet remotingServlet = (SwitchYardRemotingServlet) wrapper.getServlet();
remotingServlet.setEndpointPublisher(this);
_log.info("Published Remote Service Endpoint " + _serverContext.getPath());
} else {
throw new RuntimeException("Context " + _contextName + " already exists!");
}
}
protected Realm getRealm(HttpServletRequest request) {
String serverName = request.getServerName();
String contextPath = request.getContextPath();
Host host = (Host) engine.findChild(serverName);
if (host == null) {
// if it cannot find host, then use the default host.
host = (Host) engine.findChild(engine.getDefaultHost());
if (host == null)
throw new NullPointerException(
"Could not find Tomcat host for: " + serverName + " or: " + engine.getDefaultHost());
}
Context context = (Context) host.findChild(contextPath);
if (context == null)
throw new NullPointerException("Could not find Tomcat context for: " + contextPath);
Realm realm = context.getRealm();
if (realm == null)
throw new NullPointerException(
"Could not find Tomcat realm for: " + serverName + "" + contextPath);
return realm;
}
public void undeploy(String url) {
if (host.findChild(url) != null) {
this.host.removeChild(host.findChild(url));
log.debug("undeploy web context:" + url);
}
}
/** Check resources for redeployment and reloading. */
protected synchronized void checkResources(DeployedApplication app) {
String[] resources = (String[]) app.redeployResources.keySet().toArray(new String[0]);
for (int i = 0; i < resources.length; i++) {
File resource = new File(resources[i]);
if (log.isDebugEnabled())
log.debug("Checking context[" + app.name + "] redeploy resource " + resource);
if (resource.exists()) {
long lastModified = ((Long) app.redeployResources.get(resources[i])).longValue();
if ((!resource.isDirectory()) && resource.lastModified() > lastModified) {
// Undeploy application
if (log.isInfoEnabled()) log.info(sm.getString("hostConfig.undeploy", app.name));
ContainerBase context = (ContainerBase) host.findChild(app.name);
try {
host.removeChild(context);
} catch (Throwable t) {
log.warn(sm.getString("hostConfig.context.remove", app.name), t);
}
try {
context.destroy();
} catch (Throwable t) {
log.warn(sm.getString("hostConfig.context.destroy", app.name), t);
}
// Delete other redeploy resources
for (int j = i + 1; j < resources.length; j++) {
try {
File current = new File(resources[j]);
current = current.getCanonicalFile();
if ((current
.getAbsolutePath()
.startsWith(appBase().getAbsolutePath() + File.separator))
|| (current.getAbsolutePath().startsWith(configBase().getAbsolutePath()))) {
if (log.isDebugEnabled()) log.debug("Delete " + current);
ExpandWar.delete(current);
}
} catch (IOException e) {
log.warn(sm.getString("hostConfig.canonicalizing", app.name), e);
}
}
deployed.remove(app.name);
return;
}
} else {
// There is a chance the the resource was only missing
// temporarily eg renamed during a text editor save
try {
Thread.sleep(500);
} catch (InterruptedException e1) {
// Ignore
}
// Recheck the resource to see if it was really deleted
if (resource.exists()) {
continue;
}
long lastModified = ((Long) app.redeployResources.get(resources[i])).longValue();
if (lastModified == 0L) {
continue;
}
// Undeploy application
if (log.isInfoEnabled()) log.info(sm.getString("hostConfig.undeploy", app.name));
ContainerBase context = (ContainerBase) host.findChild(app.name);
try {
host.removeChild(context);
} catch (Throwable t) {
log.warn(sm.getString("hostConfig.context.remove", app.name), t);
}
try {
context.destroy();
} catch (Throwable t) {
log.warn(sm.getString("hostConfig.context.destroy", app.name), t);
}
// Delete all redeploy resources
for (int j = i + 1; j < resources.length; j++) {
try {
File current = new File(resources[j]);
current = current.getCanonicalFile();
if ((current.getAbsolutePath().startsWith(appBase().getAbsolutePath() + File.separator))
|| (current.getAbsolutePath().startsWith(configBase().getAbsolutePath()))) {
if (log.isDebugEnabled()) log.debug("Delete " + current);
ExpandWar.delete(current);
}
} catch (IOException e) {
log.warn(sm.getString("hostConfig.canonicalizing", app.name), e);
}
}
// Delete reload resources as well (to remove any remaining .xml descriptor)
String[] resources2 = (String[]) app.reloadResources.keySet().toArray(new String[0]);
for (int j = 0; j < resources2.length; j++) {
try {
File current = new File(resources2[j]);
current = current.getCanonicalFile();
if ((current.getAbsolutePath().startsWith(appBase().getAbsolutePath() + File.separator))
|| ((current.getAbsolutePath().startsWith(configBase().getAbsolutePath())
&& (current.getAbsolutePath().endsWith(".xml"))))) {
if (log.isDebugEnabled()) log.debug("Delete " + current);
ExpandWar.delete(current);
}
} catch (IOException e) {
log.warn(sm.getString("hostConfig.canonicalizing", app.name), e);
}
}
deployed.remove(app.name);
return;
}
}
resources = (String[]) app.reloadResources.keySet().toArray(new String[0]);
for (int i = 0; i < resources.length; i++) {
File resource = new File(resources[i]);
if (log.isDebugEnabled())
log.debug("Checking context[" + app.name + "] reload resource " + resource);
long lastModified = ((Long) app.reloadResources.get(resources[i])).longValue();
if ((!resource.exists() && lastModified != 0L) || (resource.lastModified() != lastModified)) {
// Reload application
if (log.isInfoEnabled()) log.info(sm.getString("hostConfig.reload", app.name));
Container context = host.findChild(app.name);
try {
((Lifecycle) context).stop();
} catch (Exception e) {
log.warn(sm.getString("hostConfig.context.restart", app.name), e);
}
// If the context was not started (for example an error
// in web.xml) we'll still get to try to start
try {
((Lifecycle) context).start();
} catch (Exception e) {
log.warn(sm.getString("hostConfig.context.restart", app.name), e);
}
// Update times
app.reloadResources.put(resources[i], new Long(resource.lastModified()));
app.timestamp = System.currentTimeMillis();
return;
}
}
}
/**
* Check if a webapp is already deployed in this host.
*
* @param contextPath of the context which will be checked
*/
protected boolean deploymentExists(String contextPath) {
return (deployed.containsKey(contextPath) || (host.findChild(contextPath) != null));
}
/**
* @param contextPath
* @param contextXml
* @param file
*/
protected void deployDescriptor(String contextPath, File contextXml, String file) {
if (deploymentExists(contextPath)) {
return;
}
DeployedApplication deployedApp = new DeployedApplication(contextPath);
// Assume this is a configuration descriptor and deploy it
if (log.isInfoEnabled()) {
log.info(sm.getString("hostConfig.deployDescriptor", file));
}
Context context = null;
try {
synchronized (digester) {
try {
context = (Context) digester.parse(contextXml);
if (context == null) {
log.error(sm.getString("hostConfig.deployDescriptor.error", file));
return;
}
} finally {
digester.reset();
}
}
if (context instanceof Lifecycle) {
Class clazz = Class.forName(host.getConfigClass());
LifecycleListener listener = (LifecycleListener) clazz.newInstance();
((Lifecycle) context).addLifecycleListener(listener);
}
context.setConfigFile(contextXml.getAbsolutePath());
context.setPath(contextPath);
// Add the associated docBase to the redeployed list if it's a WAR
boolean isExternalWar = false;
boolean isExternal = false;
if (context.getDocBase() != null) {
File docBase = new File(context.getDocBase());
if (!docBase.isAbsolute()) {
docBase = new File(appBase(), context.getDocBase());
}
// If external docBase, register .xml as redeploy first
if (!docBase.getCanonicalPath().startsWith(appBase().getAbsolutePath() + File.separator)) {
isExternal = true;
deployedApp.redeployResources.put(
contextXml.getAbsolutePath(), new Long(contextXml.lastModified()));
deployedApp.redeployResources.put(
docBase.getAbsolutePath(), new Long(docBase.lastModified()));
if (docBase.getAbsolutePath().toLowerCase().endsWith(".war")) {
isExternalWar = true;
}
} else {
log.warn(sm.getString("hostConfig.deployDescriptor.localDocBaseSpecified", docBase));
// Ignore specified docBase
context.setDocBase(null);
}
}
host.addChild(context);
// Get paths for WAR and expanded WAR in appBase
String name = null;
String path = context.getPath();
if (path.equals("")) {
name = "ROOT";
} else {
if (path.startsWith("/")) {
name = path.substring(1);
} else {
name = path;
}
}
File expandedDocBase = new File(appBase(), name);
if (context.getDocBase() != null) {
// first assume docBase is absolute
expandedDocBase = new File(context.getDocBase());
if (!expandedDocBase.isAbsolute()) {
// if docBase specified and relative, it must be relative to appBase
expandedDocBase = new File(appBase(), context.getDocBase());
}
}
// Add the eventual unpacked WAR and all the resources which will be
// watched inside it
if (isExternalWar && unpackWARs) {
deployedApp.redeployResources.put(
expandedDocBase.getAbsolutePath(), new Long(expandedDocBase.lastModified()));
deployedApp.redeployResources.put(
contextXml.getAbsolutePath(), new Long(contextXml.lastModified()));
addWatchedResources(deployedApp, expandedDocBase.getAbsolutePath(), context);
} else {
// Find an existing matching war and expanded folder
if (!isExternal) {
File warDocBase = new File(expandedDocBase.getAbsolutePath() + ".war");
if (warDocBase.exists()) {
deployedApp.redeployResources.put(
warDocBase.getAbsolutePath(), new Long(warDocBase.lastModified()));
}
}
if (expandedDocBase.exists()) {
deployedApp.redeployResources.put(
expandedDocBase.getAbsolutePath(), new Long(expandedDocBase.lastModified()));
addWatchedResources(deployedApp, expandedDocBase.getAbsolutePath(), context);
} else {
addWatchedResources(deployedApp, null, context);
}
// Add the context XML to the list of files which should trigger a redeployment
if (!isExternal) {
deployedApp.redeployResources.put(
contextXml.getAbsolutePath(), new Long(contextXml.lastModified()));
}
}
} catch (Throwable t) {
log.error(sm.getString("hostConfig.deployDescriptor.error", file), t);
}
if (context != null && host.findChild(context.getName()) != null) {
deployed.put(contextPath, deployedApp);
}
}
/**
* Remove a webapp from our control. Entry point for the admin webapp, and other JMX Context
* controlers.
*/
public void unmanageApp(String contextPath) {
if (isServiced(contextPath)) {
deployed.remove(contextPath);
host.removeChild(host.findChild(contextPath));
}
}
protected Context findContextInternal(String name) {
return (Context) host.findChild(name);
}
