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Monitoring of JavaEE applications
/*
* Copyright 2008-2017 by Emeric Vernat
*
* This file is part of Java Melody.
*
* Licensed 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 net.bull.javamelody.internal.model;
import java.io.File;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.lang.reflect.Method;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import javax.management.JMException;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
import javax.servlet.http.HttpSession;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import net.bull.javamelody.Parameter;
import net.bull.javamelody.SessionListener;
import net.bull.javamelody.internal.common.I18N;
import net.bull.javamelody.internal.common.InputOutput;
import net.bull.javamelody.internal.common.LOG;
import net.bull.javamelody.internal.common.Parameters;
import net.bull.javamelody.internal.web.MailReport;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
/**
* Énumération des actions possibles dans l'IHM.
* @author Emeric Vernat
* @author David J. M. Karlsen (IBM heapdump support)
*/
public enum Action {
/** Test d'envoi du rapport pdf par mail. */
MAIL_TEST(""),
/** Réinitialisation d'un compteur non périodique. */
CLEAR_COUNTER("http"),
/** Garbage Collect. */
GC("systeminfo"),
/** Invalidations des sessions http. */
INVALIDATE_SESSIONS("systeminfo"),
/** Invalidation d'une session http. */
INVALIDATE_SESSION(""),
/** Invalidation de la session http courante. */
LOGOUT(""),
/** Heap dump. */
HEAP_DUMP("systeminfo"),
/** Purge le contenu de tous les caches (ie, for ALL_CACHE_MANAGERS {cacheManager.clearAll()}). */
CLEAR_CACHES("caches"),
/** Purge le contenu d'un cache. */
CLEAR_CACHE("caches"),
/** Purge la clé d'un cache. */
CLEAR_CACHE_KEY("caches"),
/** Tue un thread java. */
KILL_THREAD("threads"),
/** Envoi un signal interrupt à un thread java. */
SEND_THREAD_INTERRUPT("threads"),
/** Met un job quartz en pause. */
PAUSE_JOB("jobs"),
/** Enlève la pause d'un job quartz. */
RESUME_JOB("jobs"),
/** Réinitialisation des hotspots. */
CLEAR_HOTSPOTS(""),
/** Purge les fichiers .rrd et .ser.gz obsolètes. */
PURGE_OBSOLETE_FILES("bottom");
/**
* Booléen selon que l'action 'Garbage collector' est possible.
*/
public static final boolean GC_ENABLED = !ManagementFactory.getRuntimeMXBean()
.getInputArguments().contains("-XX:+DisableExplicitGC");
static final String JAVA_VENDOR = System.getProperty("java.vendor");
private static final String ALL = "all";
/**
* Nom du contexte dans lequel est exécutée l'action
* (servira dans l'url pour replacer la page html sur l'anchor de même nom)
*/
private final String contextName;
Action(String contextName) {
this.contextName = contextName;
}
public String getContextName(String counterName) {
if (this == CLEAR_COUNTER && !ALL.equalsIgnoreCase(counterName)) {
return counterName;
}
return contextName;
}
/**
* Convertit le code d'une action en énumération de l'action.
* @param action String
* @return Action
*/
public static Action valueOfIgnoreCase(String action) {
return valueOf(action.toUpperCase(Locale.ENGLISH).trim());
}
/**
* Vérifie que le paramètre pour activer les actions systèmes est positionné.
*/
public static void checkSystemActionsEnabled() {
if (!Parameters.isSystemActionsEnabled()) {
throw new IllegalStateException(I18N.getString("Actions_non_activees"));
}
}
// méthode conservée pour compatibilité ascendante, notamment dans Jenkins
public String execute(Collector collector, CollectorServer collectorServer, String counterName,
String sessionId, String threadId, String jobId, String cacheId) throws IOException {
return execute(collector, collectorServer, null, counterName, sessionId, threadId, jobId,
cacheId, null);
}
// CHECKSTYLE:OFF
// since 1.49
String execute(Collector collector, CollectorServer collectorServer, HttpSession currentSession,
String counterName, String sessionId, String threadId, String jobId, String cacheId)
throws IOException {
// CHECKSTYLE:ON
return execute(collector, collectorServer, currentSession, counterName, sessionId, threadId,
jobId, cacheId, null);
}
/**
* Exécute l'action.
* @param collector Collector pour une réinitialisation et test de mail
* @param collectorServer Serveur de collecte pour test de mail (null s'il n'y en a pas)
* @param currentSession session http de l'utilisateur exécutant l'action (null sinon)
* @param counterName Nom du compteur pour une réinitialisation
* @param sessionId Identifiant de session pour invalidation (null sinon)
* @param threadId Identifiant du thread sous la forme pid_ip_id
* @param jobId Identifiant du job sous la forme pid_ip_id
* @param cacheId Identifiant du cache à vider
* @param cacheKey Identifiant d'une clé de cache à vider
* @return Message de résultat
* @throws IOException e
* @since 1.66
*/
// CHECKSTYLE:OFF
public String execute(Collector collector, CollectorServer collectorServer, // NOPMD
HttpSession currentSession, String counterName, String sessionId, String threadId,
String jobId, String cacheId, String cacheKey) throws IOException {
// CHECKSTYLE:ON
final String messageForReport;
switch (this) {
case CLEAR_COUNTER:
assert collector != null;
assert counterName != null;
messageForReport = clearCounter(collector, counterName);
break;
case MAIL_TEST:
assert collector != null;
messageForReport = mailTest(collector, collectorServer);
break;
case GC:
if (GC_ENABLED) {
// garbage collector
final long kbFreed = gc();
final long stillUsed = (Runtime.getRuntime().totalMemory()
- Runtime.getRuntime().freeMemory()) / 1024;
messageForReport = I18N.getFormattedString("ramasse_miette_execute", kbFreed,
stillUsed);
} else {
messageForReport = I18N.getString("ramasse_miette_desactive");
}
break;
case HEAP_DUMP:
if (JAVA_VENDOR.contains("IBM")) {
ibmHeapDump();
messageForReport = I18N.getString("heap_dump_genere_ibm");
} else {
// heap dump à générer dans le répertoire temporaire sur le serveur
// avec un suffixe contenant le host, la date et l'heure et avec une extension hprof
// (utiliser jvisualvm du jdk ou MAT d'eclipse en standalone ou en plugin)
final File heapDump = heapDump();
final File zipFile = new File(heapDump.getParentFile(),
heapDump.getName() + ".zip");
InputOutput.zipFile(heapDump, zipFile);
InputOutput.deleteFile(heapDump);
final String path = zipFile.getPath();
messageForReport = I18N.getFormattedString("heap_dump_genere",
path.replace('\\', '/'));
}
break;
case INVALIDATE_SESSIONS:
// invalidation des sessions http
SessionListener.invalidateAllSessionsExceptCurrentSession(currentSession);
messageForReport = I18N.getString("sessions_http_invalidees");
break;
case INVALIDATE_SESSION:
// invalidation d'une session http
assert sessionId != null;
SessionListener.invalidateSession(sessionId);
messageForReport = I18N.getString("session_http_invalidee");
break;
case LOGOUT:
// invalidation de la session http courante
if (currentSession != null) {
SessionListener.invalidateSession(currentSession.getId());
}
messageForReport = I18N.getString("logged_out");
break;
case CLEAR_CACHES:
clearCaches();
messageForReport = I18N.getString("caches_purges");
break;
case CLEAR_CACHE:
clearCache(cacheId);
messageForReport = I18N.getFormattedString("cache_purge", cacheId);
break;
case CLEAR_CACHE_KEY:
clearCacheKey(cacheId, cacheKey);
messageForReport = I18N.getFormattedString("cache_key_purge", cacheId, cacheKey);
break;
case KILL_THREAD:
assert threadId != null;
messageForReport = killThread(threadId);
break;
case SEND_THREAD_INTERRUPT:
assert threadId != null;
messageForReport = sendThreadInterrupt(threadId);
break;
case PAUSE_JOB:
assert jobId != null;
messageForReport = pauseJob(jobId);
break;
case RESUME_JOB:
assert jobId != null;
messageForReport = resumeJob(jobId);
break;
case CLEAR_HOTSPOTS:
assert collector.getSamplingProfiler() != null;
collector.getSamplingProfiler().clear();
messageForReport = I18N.getString("hotspots_cleared");
break;
case PURGE_OBSOLETE_FILES:
assert collector != null;
collector.deleteObsoleteFiles();
messageForReport = I18N.getString("fichiers_obsoletes_purges") + '\n'
+ I18N.getString("Usage_disque") + ": "
+ (collector.getDiskUsage() / 1024 / 1024 + 1) + ' ' + I18N.getString("Mo");
break;
default:
throw new IllegalStateException(toString());
}
if (messageForReport != null) {
// log pour information en debug
LOG.debug("Action '" + this + "' executed. Result: "
+ messageForReport.replace('\n', ' '));
}
return messageForReport;
}
private String clearCounter(Collector collector, String counterName) {
final String messageForReport;
if (ALL.equalsIgnoreCase(counterName)) {
for (final Counter counter : collector.getCounters()) {
collector.clearCounter(counter.getName());
}
messageForReport = I18N.getFormattedString("Toutes_statistiques_reinitialisees",
counterName);
} else {
// l'action Réinitialiser a été appelée pour un compteur
collector.clearCounter(counterName);
messageForReport = I18N.getFormattedString("Statistiques_reinitialisees", counterName);
}
return messageForReport;
}
private String mailTest(Collector collector, CollectorServer collectorServer) {
// note: a priori, inutile de traduire cela
if (!Parameters.isPdfEnabled()) {
throw new IllegalStateException("itext classes not found: add the itext dependency");
}
if (Parameter.MAIL_SESSION.getValue() == null) {
throw new IllegalStateException(
"mail-session has no value: add the mail-session parameter");
}
if (Parameter.ADMIN_EMAILS.getValue() == null) {
throw new IllegalStateException(
"admin-emails has no value: add the admin-emails parameter");
}
try {
if (collectorServer == null) {
// serveur local
new MailReport().sendReportMailForLocalServer(collector, Period.JOUR);
} else {
// serveur de collecte
new MailReport().sendReportMail(collector, true, collectorServer
.getJavaInformationsByApplication(collector.getApplication()), Period.JOUR);
}
} catch (final Exception e) {
throw new RuntimeException(e); // NOPMD
}
return "Mail sent with pdf report for the day to admins";
}
private File heapDump() throws IOException {
try {
final ObjectName objectName = new ObjectName(
"com.sun.management:type=HotSpotDiagnostic");
final CompositeData vmOption = (CompositeData) MBeansAccessor.invoke(objectName,
"getVMOption", new Object[] { "HeapDumpPath" }, new Class[] { String.class });
final String heapDumpPath;
if (vmOption == null) {
heapDumpPath = null;
} else {
heapDumpPath = (String) vmOption.get("value");
}
final String path;
if (heapDumpPath == null || heapDumpPath.isEmpty()) {
path = Parameters.TEMPORARY_DIRECTORY.getPath();
} else {
// -XX:HeapDumpPath=/tmp par exemple a été spécifié comme paramètre de VM.
// Dans ce cas, on prend en compte ce paramètre "standard" de la JVM Hotspot
final File file = new File(heapDumpPath);
if (file.exists()) {
if (file.isDirectory()) {
path = heapDumpPath;
} else {
path = file.getParent();
}
} else {
if (!file.mkdirs()) {
throw new IllegalStateException("Can't create directory " + file.getPath());
}
path = heapDumpPath;
}
}
final DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault());
final File heapDumpFile = new File(path, "heapdump-" + Parameters.getHostName() + '-'
+ PID.getPID() + '-' + dateFormat.format(new Date()) + ".hprof");
if (heapDumpFile.exists()) {
try {
// si le fichier existe déjà, un heap dump a déjà été généré dans la même seconde
// donc on attends 1 seconde pour créer le fichier avec un nom différent
Thread.sleep(1000);
} catch (final InterruptedException e) {
throw new IllegalStateException(e);
}
return heapDump();
}
final boolean gcBeforeHeapDump = true;
MBeansAccessor.invoke(objectName, "dumpHeap",
new Object[] { heapDumpFile.getPath(), gcBeforeHeapDump },
new Class[] { String.class, boolean.class });
return heapDumpFile;
} catch (final JMException e) {
throw new IllegalStateException(e);
}
}
private void ibmHeapDump() {
try {
final Class dumpClass = getClass().getClassLoader().loadClass("com.ibm.jvm.Dump"); // NOPMD
final Class[] argTypes = null;
final Method dump = dumpClass.getMethod("HeapDump", argTypes);
final Object[] args = null;
dump.invoke(null, args);
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
// cette méthode doit s'appeler "gc" pour que findbugs ne fasse pas de warning
@SuppressWarnings("all")
private long gc() {
final long before = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
Runtime.getRuntime().gc();
final long after = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
return (before - after) / 1024;
}
private void clearCaches() {
final List allCacheManagers = CacheManager.ALL_CACHE_MANAGERS;
for (final CacheManager cacheManager : allCacheManagers) {
cacheManager.clearAll();
}
}
private void clearCache(String cacheId) {
final List allCacheManagers = CacheManager.ALL_CACHE_MANAGERS;
for (final CacheManager cacheManager : allCacheManagers) {
final Cache cache = cacheManager.getCache(cacheId);
if (cache != null) {
cache.removeAll();
}
}
}
private void clearCacheKey(String cacheId, String cacheKey) {
final List allCacheManagers = CacheManager.ALL_CACHE_MANAGERS;
for (final CacheManager cacheManager : allCacheManagers) {
final Cache cache = cacheManager.getCache(cacheId);
if (cache != null) {
final boolean removed = cache.remove(cacheKey);
if (!removed) {
// if keys are not Strings, we have to find the initial key
for (final Object key : cache.getKeys()) {
if (key != null && key.toString().equals(cacheKey)) {
cache.remove(key);
break;
}
}
}
}
}
}
private String killThread(String globalThreadId) {
final Long threadId = getThreadIdFromGlobalThreadIdIfSameJvm(globalThreadId);
if (threadId != null) {
final List threads = JavaInformations.getThreadsFromThreadGroups();
for (final Thread thread : threads) {
if (thread.getId() == threadId.longValue()) {
if (thread.getName().startsWith("javamelody")) {
return "I will not kill myself";
}
stopThread(thread);
return I18N.getFormattedString("Thread_tue", thread.getName());
}
}
return I18N.getString("Thread_non_trouve");
}
// cette action ne concernait pas cette JVM, donc on ne fait rien
return null;
}
@SuppressWarnings("deprecation")
private void stopThread(Thread thread) {
// I know that it is unsafe and the user has been warned
thread.stop();
}
private String sendThreadInterrupt(String globalThreadId) {
final Long threadId = getThreadIdFromGlobalThreadIdIfSameJvm(globalThreadId);
if (threadId != null) {
final List threads = JavaInformations.getThreadsFromThreadGroups();
for (final Thread thread : threads) {
if (thread.getId() == threadId.longValue()) {
if (thread.getName().startsWith("javamelody")) {
return "I will not interrupt myself";
}
thread.interrupt();
return I18N.getFormattedString("thread_interrupt_sent", thread.getName());
}
}
return I18N.getString("Thread_non_trouve");
}
// cette action ne concernait pas cette JVM, donc on ne fait rien
return null;
}
private Long getThreadIdFromGlobalThreadIdIfSameJvm(String globalThreadId) {
final String[] values = globalThreadId.split("_");
if (values.length != 3) {
throw new IllegalArgumentException(globalThreadId);
}
// rq : la syntaxe vérifiée ici doit être conforme à ThreadInformations.buildGlobalThreadId
if (values[0].equals(PID.getPID()) && values[1].equals(Parameters.getHostAddress())) {
return Long.valueOf(values[2]);
}
return null;
}
private String pauseJob(String jobId) {
if (ALL.equalsIgnoreCase(jobId)) {
pauseAllJobs();
return I18N.getString("all_jobs_paused");
}
final String[] values = jobId.split("_");
if (values.length != 3) {
throw new IllegalArgumentException(jobId);
}
// rq : la syntaxe vérifiée ici doit être conforme à JobInformations.buildGlobalJobId
if (values[0].equals(PID.getPID()) && values[1].equals(Parameters.getHostAddress())) {
if (pauseJobById(Integer.parseInt(values[2]))) {
return I18N.getString("job_paused");
}
return I18N.getString("job_notfound");
}
// cette action ne concernait pas cette JVM, donc on ne fait rien
return null;
}
private boolean pauseJobById(int myJobId) {
try {
final QuartzAdapter quartzAdapter = QuartzAdapter.getSingleton();
for (final Scheduler scheduler : JobInformations.getAllSchedulers()) {
for (final JobDetail jobDetail : quartzAdapter.getAllJobsOfScheduler(scheduler)) {
if (quartzAdapter.getJobFullName(jobDetail).hashCode() == myJobId) {
quartzAdapter.pauseJob(jobDetail, scheduler);
return true;
}
}
}
return false;
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
private void pauseAllJobs() {
try {
for (final Scheduler scheduler : JobInformations.getAllSchedulers()) {
scheduler.pauseAll();
}
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
private String resumeJob(String jobId) {
if (ALL.equalsIgnoreCase(jobId)) {
resumeAllJobs();
return I18N.getString("all_jobs_resumed");
}
final String[] values = jobId.split("_");
if (values.length != 3) {
throw new IllegalArgumentException(jobId);
}
// rq : la syntaxe vérifiée ici doit être conforme à JobInformations.buildGlobalJobId
if (values[0].equals(PID.getPID()) && values[1].equals(Parameters.getHostAddress())) {
if (resumeJobById(Integer.parseInt(values[2]))) {
return I18N.getString("job_resumed");
}
return I18N.getString("job_notfound");
}
// cette action ne concernait pas cette JVM, donc on ne fait rien
return null;
}
private boolean resumeJobById(int myJobId) {
try {
final QuartzAdapter quartzAdapter = QuartzAdapter.getSingleton();
for (final Scheduler scheduler : JobInformations.getAllSchedulers()) {
for (final JobDetail jobDetail : quartzAdapter.getAllJobsOfScheduler(scheduler)) {
if (quartzAdapter.getJobFullName(jobDetail).hashCode() == myJobId) {
quartzAdapter.resumeJob(jobDetail, scheduler);
return true;
}
}
}
return false;
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
private void resumeAllJobs() {
try {
for (final Scheduler scheduler : JobInformations.getAllSchedulers()) {
scheduler.resumeAll();
}
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
}