/*
* 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.cocoon.generation;
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.cocoon.Constants;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.ResourceNotFoundException;
import org.apache.cocoon.components.flow.ContinuationsManager;
import org.apache.cocoon.components.flow.WebContinuation;
import org.apache.cocoon.components.flow.WebContinuationDataBean;
import org.apache.cocoon.components.source.SourceUtil;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.xml.AttributesImpl;
import org.apache.cocoon.xml.XMLUtils;
import org.apache.commons.lang.SystemUtils;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceException;
import org.apache.excalibur.source.TraversableSource;
import org.apache.excalibur.store.Store;
import org.apache.excalibur.store.StoreJanitor;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeSet;
/**
* @cocoon.sitemap.component.documentation
* Generates an XML representation of the current status of Cocoon.
*
* @cocoon.sitemap.component.name status
* @cocoon.sitemap.component.label content
* @cocoon.sitemap.component.logger sitemap.generator.status
*
* @cocoon.sitemap.component.pooling.max 16
*
* Potted DTD:
*
* <code>
* <!ELEMENT statusinfo (group|value)*>
*
* <!ATTLIST statusinfo
* date CDATA #IMPLIED
* host CDATA #IMPLIED
* cocoon-version CDATA #IMPLIED
* >
*
* <!ELEMENT group (group|value)*>
* <!ATTLIST group
* name CDATA #IMPLIED
* >
*
* <!ELEMENT value (line)+>
* <!ATTLIST value
* name CDATA #REQUIRED
*
* <!ELEMENT line (#PCDATA)+>
* >
* </code>
*
* @author <a href="mailto:paul@luminas.co.uk">Paul Russell</a> (Luminas Limited)
* @author <a href="mailto:stefano@apache.org">Stefano Mazzocchi</a>
* @author <a href="mailto:skoechlin@ivision.fr">Sébastien Kœchlin</a> (iVision)
* @author <a href="mailto:g-froehlich@gmx.de">Gerhard Froehlich</a>
* @version $Id: StatusGenerator.java 643296 2008-04-01 06:24:50Z joerg $
*/
public class StatusGenerator extends ServiceableGenerator
implements Contextualizable, Configurable {
/**
* The XML namespace for the output document.
*/
public static final String NAMESPACE = "http://apache.org/cocoon/status/2.0";
/**
* The XML namespace for xlink
*/
protected static final String XLINK_NS = "http://www.w3.org/1999/xlink";
/**
* The namespace prefix for xlink namespace
*/
protected static final String XLINK_PREFIX = "xlink";
/**
* The component context.
*/
protected Context context;
/**
* The StoreJanitor used to get cache statistics
*/
protected StoreJanitor storeJanitor;
/**
* The persistent store
*/
protected Store storePersistent;
/**
* Show continuations information
*/
private boolean showContinuations;
/**
* The ContinuationManager
*/
private ContinuationsManager continuationsManager;
/**
* List & show the contents of WEB/lib
*/
private boolean showLibrary;
/**
* WEB-INF/lib directory
*/
private Source libDirectory;
public void contextualize(Context context) throws ContextException {
this.context = context;
}
public void configure(Configuration configuration) throws ConfigurationException {
this.showContinuations = configuration.getChild("show-continuations").getValueAsBoolean(true);
this.showLibrary = configuration.getChild("show-libraries").getValueAsBoolean(true);
}
/**
* Set the current <code>ServiceManager</code> instance used by this
* <code>Serviceable</code>.
* Need to get statistics about cache hits
*/
public void service(ServiceManager manager) throws ServiceException {
super.service(manager);
if (this.manager.hasService(StoreJanitor.ROLE)) {
this.storeJanitor = (StoreJanitor) manager.lookup(StoreJanitor.ROLE);
} else {
getLogger().info("StoreJanitor is not available. Sorry, no cache statistics");
}
if (this.manager.hasService(Store.PERSISTENT_STORE)) {
this.storePersistent = (Store) this.manager.lookup(Store.PERSISTENT_STORE);
} else {
getLogger().info("Persistent Store is not available. Sorry no cache statistics about it.");
}
if(this.manager.hasService(ContinuationsManager.ROLE)) {
continuationsManager = (ContinuationsManager) this.manager.lookup(ContinuationsManager.ROLE);
} else {
getLogger().info("ContinuationsManager is not available. Sorry no overview of created continuations");
}
}
public void setup(SourceResolver resolver, Map objectModel, String src, Parameters par)
throws ProcessingException, SAXException, IOException {
super.setup(resolver, objectModel, src, par);
if (this.showLibrary) {
try {
this.libDirectory = super.resolver.resolveURI("context://WEB-INF/lib");
} catch (SourceException e) {
throw SourceUtil.handle(e);
}
}
}
/**
* @see org.apache.avalon.framework.activity.Disposable#dispose()
*/
public void dispose() {
if (this.manager != null) {
this.manager.release(this.storePersistent);
this.manager.release(this.storeJanitor);
this.storePersistent = null;
this.storeJanitor = null;
}
if (this.libDirectory != null) {
super.resolver.release(this.libDirectory);
this.libDirectory = null;
}
super.dispose();
}
/**
* Generate the status information in XML format.
* @throws SAXException
* when there is a problem creating the output SAX events.
*/
public void generate() throws SAXException, ProcessingException {
// Start the document and set the namespace.
super.contentHandler.startDocument();
super.contentHandler.startPrefixMapping("", NAMESPACE);
super.contentHandler.startPrefixMapping(XLINK_PREFIX, XLINK_NS);
genStatus();
// End the document.
super.contentHandler.endPrefixMapping(XLINK_PREFIX);
super.contentHandler.endPrefixMapping("");
super.contentHandler.endDocument();
}
/**
* Generate the main status document.
*/
private void genStatus() throws SAXException, ProcessingException {
// Root element.
// The current date and time.
String dateTime = DateFormat.getDateTimeInstance().format(new Date());
String localHost;
// The local host.
try {
localHost = InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException e) {
getLogger().debug("StatusGenerator:UnknownHost", e);
localHost = "";
} catch (SecurityException e) {
getLogger().debug("StatusGenerator:Security", e);
localHost = "";
}
AttributesImpl atts = new AttributesImpl();
atts.addCDATAAttribute(NAMESPACE, "date", dateTime);
atts.addCDATAAttribute(NAMESPACE, "host", localHost);
atts.addCDATAAttribute(NAMESPACE, "cocoon-version", Constants.VERSION);
super.contentHandler.startElement(NAMESPACE, "statusinfo", "statusinfo", atts);
if (this.showContinuations) {
genContinuationsTree();
}
genVMStatus();
genProperties();
if (this.showLibrary) {
genLibrarylist();
}
// End root element.
super.contentHandler.endElement(NAMESPACE, "statusinfo", "statusinfo");
}
private void genContinuationsTree() throws SAXException {
startGroup("Continuations");
Set continuations = this.continuationsManager.getForest();
for (Iterator i = continuations.iterator(); i.hasNext();) {
displayContinuation(new WebContinuationDataBean((WebContinuation) i.next()));
}
endGroup();
}
private void displayContinuation(WebContinuationDataBean wc) throws SAXException {
AttributesImpl ai = new AttributesImpl();
ai.addAttribute(NAMESPACE, "id", "id", "CDATA", wc.getId());
ai.addAttribute(NAMESPACE, "interpreter", "interpreter", "CDATA", wc.getInterpreterId());
ai.addAttribute(NAMESPACE, "expire-time", "expire-time", "CDATA", wc.getExpireTime());
ai.addAttribute(NAMESPACE, "time-to-live", "time-to-live", "CDATA", wc.getTimeToLive() + "ms");
ai.addAttribute(NAMESPACE, "last-access-time", "last-access-time", "CDATA", wc.getLastAccessTime());
super.contentHandler.startElement(NAMESPACE, "cont", "cont", ai);
List children = wc.get_children();
for (int i = 0; i < children.size(); i++) {
displayContinuation((WebContinuationDataBean) children.get(i));
}
super.contentHandler.endElement(NAMESPACE, "cont", "cont");
}
private void genVMStatus() throws SAXException {
AttributesImpl atts = new AttributesImpl();
startGroup("VM");
// BEGIN ClassPath
String classpath = SystemUtils.JAVA_CLASS_PATH;
if (classpath != null) {
List paths = new ArrayList();
StringTokenizer tokenizer = new StringTokenizer(classpath, SystemUtils.PATH_SEPARATOR);
while (tokenizer.hasMoreTokens()) {
paths.add(tokenizer.nextToken());
}
addMultilineValue("classpath", paths);
}
// END ClassPath
// BEGIN CONTEXT CLASSPATH
String contextClassPath = null;
try {
contextClassPath = (String) this.context.get(Constants.CONTEXT_CLASSPATH);
} catch (ContextException e) {
// we ignore this
}
if (contextClassPath != null) {
List paths = new ArrayList();
StringTokenizer tokenizer = new StringTokenizer(contextClassPath, File.pathSeparator);
while (tokenizer.hasMoreTokens()) {
paths.add(tokenizer.nextToken());
}
addMultilineValue("context-classpath", paths);
}
// END CONTEXT CLASSPATH
// BEGIN Memory status
startGroup("Memory");
final long totalMemory = Runtime.getRuntime().totalMemory();
final long freeMemory = Runtime.getRuntime().freeMemory();
addValue("total", String.valueOf(totalMemory));
addValue("used", String.valueOf(totalMemory - freeMemory));
addValue("free", String.valueOf(freeMemory));
endGroup();
// END Memory status
// BEGIN JRE
startGroup("JRE");
addValue("version", SystemUtils.JAVA_VERSION);
atts.clear();
// qName = prefix + ':' + localName
atts.addAttribute(XLINK_NS, "type", XLINK_PREFIX + ":type", "CDATA", "simple");
atts.addAttribute(XLINK_NS, "href", XLINK_PREFIX + ":href", "CDATA", SystemUtils.JAVA_VENDOR_URL);
addValue("java-vendor", SystemUtils.JAVA_VENDOR, atts);
endGroup();
// END JRE
// BEGIN Operating system
startGroup("Operating System");
addValue("name", SystemUtils.OS_NAME);
addValue("architecture", SystemUtils.OS_ARCH);
addValue("version", SystemUtils.OS_VERSION);
endGroup();
// END operating system
// BEGIN Cache
if (this.storeJanitor != null) {
startGroup("Store Janitor");
// For each element in StoreJanitor
Iterator i = this.storeJanitor.iterator();
while (i.hasNext()) {
Store store = (Store) i.next();
startGroup(store.getClass().getName() + " (hash = 0x" + Integer.toHexString(store.hashCode()) + ")");
int size = 0;
int empty = 0;
atts.clear();
atts.addAttribute(NAMESPACE, "name", "name", "CDATA", "cached");
super.contentHandler.startElement(NAMESPACE, "value", "value", atts);
atts.clear();
Enumeration e = store.keys();
while (e.hasMoreElements()) {
size++;
Object key = e.nextElement();
Object val = store.get(key);
String line;
if (val == null) {
empty++;
} else {
line = key + " (class: " + val.getClass().getName() + ")";
super.contentHandler.startElement(NAMESPACE, "line", "line", atts);
super.contentHandler.characters(line.toCharArray(), 0, line.length());
super.contentHandler.endElement(NAMESPACE, "line", "line");
}
}
if (size == 0) {
super.contentHandler.startElement(NAMESPACE, "line", "line", atts);
String value = "[empty]";
super.contentHandler.characters(value.toCharArray(), 0, value.length());
super.contentHandler.endElement(NAMESPACE, "line", "line");
}
super.contentHandler.endElement(NAMESPACE, "value", "value");
addValue("size", String.valueOf(size) + " items in cache (" + empty + " are empty)");
endGroup();
}
endGroup();
}
if (this.storePersistent != null) {
startGroup(storePersistent.getClass().getName() + " (hash = 0x" + Integer.toHexString(storePersistent.hashCode()) + ")");
int size = 0;
int empty = 0;
atts.clear();
atts.addAttribute(NAMESPACE, "name", "name", "CDATA", "cached");
super.contentHandler.startElement(NAMESPACE, "value", "value", atts);
atts.clear();
Enumeration e = this.storePersistent.keys();
while (e.hasMoreElements()) {
size++;
Object key = e.nextElement();
Object val = storePersistent.get(key);
String line;
if (val == null) {
empty++;
} else {
line = key + " (class: " + val.getClass().getName() + ")";
super.contentHandler.startElement(NAMESPACE, "line", "line", atts);
super.contentHandler.characters(line.toCharArray(), 0, line.length());
super.contentHandler.endElement(NAMESPACE, "line", "line");
}
}
if (size == 0) {
super.contentHandler.startElement(NAMESPACE, "line", "line", atts);
String value = "[empty]";
super.contentHandler.characters(value.toCharArray(), 0, value.length());
super.contentHandler.endElement(NAMESPACE, "line", "line");
}
super.contentHandler.endElement(NAMESPACE, "value", "value");
addValue("size", size + " items in cache (" + empty + " are empty)");
endGroup();
}
// END Cache
endGroup();
}
private void genProperties() throws SAXException {
this.startGroup("System-Properties");
final Properties p = System.getProperties();
final Enumeration e = p.keys();
while ( e.hasMoreElements() ) {
final String key = (String)e.nextElement();
final String value = p.getProperty(key);
this.addValue(key, value);
}
this.endGroup();
}
private void genLibrarylist() throws SAXException,ProcessingException {
try {
if (this.libDirectory instanceof TraversableSource) {
startGroup("WEB-INF/lib");
Set files = new TreeSet();
Collection kids = ((TraversableSource) this.libDirectory).getChildren();
try {
for (Iterator i = kids.iterator(); i.hasNext(); ) {
final Source lib = (Source) i.next();
final String name = lib.getURI().substring(lib.getURI().lastIndexOf('/') + 1);
files.add(name);
}
} finally {
for (Iterator i = kids.iterator(); i.hasNext(); ) {
final Source lib = (Source) i.next();
super.resolver.release(lib);
}
}
for (Iterator i = files.iterator(); i.hasNext(); ) {
addValue("file", (String) i.next());
}
endGroup();
}
} catch (SourceException e) {
throw new ResourceNotFoundException("Could not read directory", e);
}
}
/** Utility function to begin a <code>group</code> tag pair. */
private void startGroup(String name) throws SAXException {
startGroup(name, null);
}
/** Utility function to begin a <code>group</code> tag pair with added attributes. */
private void startGroup(String name, Attributes atts)
throws SAXException {
AttributesImpl ai = (atts == null) ? new AttributesImpl() : new AttributesImpl(atts);
ai.addAttribute(NAMESPACE, "name", "name", "CDATA", name);
super.contentHandler.startElement(NAMESPACE, "group", "group", ai);
}
/** Utility function to end a <code>group</code> tag pair. */
private void endGroup() throws SAXException {
super.contentHandler.endElement(NAMESPACE, "group", "group");
}
/** Utility function to begin and end a <code>value</code> tag pair. */
private void addValue(String name, String value)
throws SAXException {
addValue(name, value, null);
}
/** Utility function to begin and end a <code>value</code> tag pair with added attributes. */
private void addValue(String name, String value, Attributes atts)
throws SAXException {
AttributesImpl ai = (atts == null) ? new AttributesImpl() : new AttributesImpl(atts);
ai.addAttribute(NAMESPACE, "name", "name", "CDATA", name);
super.contentHandler.startElement(NAMESPACE, "value", "value", ai);
super.contentHandler.startElement(NAMESPACE, "line", "line", XMLUtils.EMPTY_ATTRIBUTES);
if (value != null) {
super.contentHandler.characters(value.toCharArray(), 0, value.length());
}
super.contentHandler.endElement(NAMESPACE, "line", "line");
super.contentHandler.endElement(NAMESPACE, "value", "value");
}
/** Utility function to begin and end a <code>value</code> tag pair. */
private void addMultilineValue(String name, List values)
throws SAXException {
addMultilineValue(name, values, null);
}
/** Utility function to begin and end a <code>value</code> tag pair with added attributes. */
private void addMultilineValue(String name, List values, Attributes atts)
throws SAXException {
AttributesImpl ai = (atts == null) ? new AttributesImpl() : new AttributesImpl(atts);
ai.addAttribute(NAMESPACE, "name", "name", "CDATA", name);
super.contentHandler.startElement(NAMESPACE, "value", "value", ai);
for (int i = 0; i < values.size(); i++) {
String value = (String) values.get(i);
if (value != null) {
super.contentHandler.startElement(NAMESPACE, "line", "line", XMLUtils.EMPTY_ATTRIBUTES);
super.contentHandler.characters(value.toCharArray(), 0, value.length());
super.contentHandler.endElement(NAMESPACE, "line", "line");
}
}
super.contentHandler.endElement(NAMESPACE, "value", "value");
}
}