/*
* (C) Copyright 2006-2017 Nuxeo (http://nuxeo.com/) and others.
*
* 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.
*
* Contributors:
* Nuxeo - initial API and implementation
*/
package org.nuxeo.runtime;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.time.Duration;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.logging.Level;
import java.util.stream.Collectors;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.nuxeo.common.codec.CryptoProperties;
import org.nuxeo.common.logging.JavaUtilLoggingHelper;
import org.nuxeo.common.logging.Log4JHelper;
import org.nuxeo.common.logging.Log4jWatchdogHandle;
import org.nuxeo.common.utils.TextTemplate;
import org.nuxeo.runtime.api.Framework;
import org.nuxeo.runtime.model.ComponentInstance;
import org.nuxeo.runtime.model.ComponentManager;
import org.nuxeo.runtime.model.ComponentName;
import org.nuxeo.runtime.model.Extension;
import org.nuxeo.runtime.model.RegistrationInfo;
import org.nuxeo.runtime.model.RuntimeContext;
import org.nuxeo.runtime.model.impl.ComponentManagerImpl;
import org.nuxeo.runtime.model.impl.DefaultRuntimeContext;
import org.osgi.framework.Bundle;
/**
* Abstract implementation of the Runtime Service.
* <p>
* Implementors are encouraged to extend this class instead of directly implementing the {@link RuntimeService}
* interface.
*
* @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
*/
public abstract class AbstractRuntimeService implements RuntimeService {
public static class RIApplicationStartedComparator implements Comparator<RegistrationInfo> {
@Override
public int compare(RegistrationInfo r1, RegistrationInfo r2) {
int cmp = Integer.compare(r1.getApplicationStartedOrder(), r2.getApplicationStartedOrder());
if (cmp == 0) {
// fallback on name order, to be deterministic
cmp = r1.getName().getName().compareTo(r2.getName().getName());
}
return cmp;
}
}
/**
* Property that controls whether or not to redirect JUL to JCL. By default is true (JUL will be redirected)
*/
public static final String REDIRECT_JUL = "org.nuxeo.runtime.redirectJUL";
public static final String REDIRECT_JUL_THRESHOLD = "org.nuxeo.runtime.redirectJUL.threshold";
public static final String LOG4J_WATCH_DISABLED = "org.nuxeo.runtime.log4jwatch.disabled";
public static final String LOG4J_WATCH_DELAY = "org.nuxeo.runtime.log4jwatch.delay";
public static final long LOG4J_WATCH_DELAY_DEFAULT = 10;
// package-private for subclass access without synthetic accessor
static final Log log = LogFactory.getLog(RuntimeService.class);
protected enum State {
STOPPED, LOADING, UNLOADING, STANDBY, STARTING, STOPPING, STARTED
};
protected State state = State.STOPPED;
protected File workingDir;
protected CryptoProperties properties = new CryptoProperties(System.getProperties());
protected ComponentManager manager;
protected final RuntimeContext context;
protected final List<RuntimeExtension> extensions = new ArrayList<>();
protected AbstractRuntimeService(DefaultRuntimeContext context) {
this(context, null);
}
/**
* Warnings during the deployment. These messages don't block startup, even in strict mode.
*/
protected final List<String> warnings = new ArrayList<>();
/**
* Errors during the deployment. Here are collected all errors occurred during the startup. These messages block
* startup in strict mode.
*
* @since 9.1
*/
protected final List<String> errors = new ArrayList<>();
protected AbstractRuntimeService(DefaultRuntimeContext context, Map<String, String> properties) {
this.context = context;
context.setRuntime(this);
if (properties != null) {
this.properties.putAll(properties);
}
// get errors set by NuxeoDeployer
String errs = System.getProperty("org.nuxeo.runtime.deployment.errors");
if (errs != null) {
errors.addAll(Arrays.asList(errs.split("\n")));
System.clearProperty("org.nuxeo.runtime.deployment.errors");
}
}
@Override
public List<String> getWarnings() {
return warnings;
}
/**
* @since 9.1
*/
@Override
public List<String> getErrors() {
return errors;
}
protected ComponentManager createComponentManager() {
return new ComponentManagerImpl(this);
}
protected static URL getBuiltinFeatureURL() {
return Thread.currentThread().getContextClassLoader().getResource("org/nuxeo/runtime/nx-feature.xml");
}
@Override
public void start() {
if (state != State.STOPPED) {
return;
}
manager = createComponentManager();
try {
loadConfig();
} catch (IOException e) {
throw new RuntimeServiceException(e);
}
if (Boolean.parseBoolean(getProperty(REDIRECT_JUL, "true"))) {
Level threshold = Level.parse(getProperty(REDIRECT_JUL_THRESHOLD, "INFO").toUpperCase());
JavaUtilLoggingHelper.redirectToApacheCommons(threshold);
}
if (Boolean.parseBoolean(getProperty(LOG4J_WATCH_DISABLED, "false"))) {
log.info("Disabled log4j.xml change detection");
} else {
Framework.addListener(new RuntimeServiceListener() {
final long delay = loadDelay();
long loadDelay() {
try {
return Long.parseLong(getProperty(LOG4J_WATCH_DELAY, Long.toString(LOG4J_WATCH_DELAY_DEFAULT)));
} catch (NumberFormatException e) {
return LOG4J_WATCH_DELAY_DEFAULT;
}
}
Log4jWatchdogHandle wdog;
@Override
public void handleEvent(RuntimeServiceEvent event) {
if (event.id == RuntimeServiceEvent.RUNTIME_ABOUT_TO_START) {
onStart();
} else if (event.id == RuntimeServiceEvent.RUNTIME_ABOUT_TO_RESUME) {
onResume();
} else if (event.id == RuntimeServiceEvent.RUNTIME_ABOUT_TO_STANDBY) {
onStandby();
} else if (event.id == RuntimeServiceEvent.RUNTIME_STOPPED) {
Framework.removeListener(this);
}
}
void onStart() {
wdog = Log4JHelper.configureAndWatch(delay);
if (wdog == null) {
log.warn("Failed to configure log4j.xml change detection");
} else {
log.info("Configured log4j.xml change detection with a delay of " + delay + "s");
}
}
void onResume() {
if (wdog != null) {
return;
}
wdog = Log4JHelper.configureAndWatch(delay);
}
void onStandby() {
if (wdog == null) {
return;
}
try {
wdog.cancel();
} finally {
wdog = null;
}
}
});
}
log.info("Starting Nuxeo Runtime service " + getName() + "; version: " + getVersion());
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_ABOUT_TO_START, this));
try {
state = State.LOADING;
doStart();
startExtensions();
} finally {
state = State.STANDBY;
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_STARTED, this));
}
}
@Override
public void stop() throws InterruptedException {
if (state.ordinal() < State.STANDBY.ordinal()) {
return;
}
try {
log.info("Stopping Nuxeo Runtime service " + getName() + "; version: " + getVersion());
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_ABOUT_TO_STOP, this));
try {
if (state == State.STARTED) {
standby(Instant.now().plus(Duration.ofMinutes(1)));
}
state = State.UNLOADING;
stopExtensions();
doStop();
manager.shutdown();
} finally {
state = State.STOPPED;
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_STOPPED, this));
manager = null;
}
} finally {
JavaUtilLoggingHelper.reset();
}
}
@Override
public boolean isStarted() {
return state.ordinal() >= State.STANDBY.ordinal();
}
@Override
public void resume() {
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_ABOUT_TO_RESUME, this));
try {
state = State.STARTING;
startComponents();
resumeExtensions();
} finally {
state = State.STARTED;
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_RESUMED, this));
}
}
@Override
public boolean isRunning() {
return state == State.STARTED;
}
@Override
public void standby(Instant deadline) throws InterruptedException {
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_ABOUT_TO_STANDBY, this));
state = State.STOPPING;
standbyExtensions();
stopComponents(deadline);
state = State.STANDBY;
Framework.sendEvent(new RuntimeServiceEvent(RuntimeServiceEvent.RUNTIME_IS_STANDBY, this));
}
@Override
public boolean isStandby() {
return state == State.STANDBY;
}
@Override
public boolean isShuttingDown() {
return state == State.STOPPING;
}
protected void loadConfig() throws IOException {
}
protected void doStart() {
}
protected void doStop() {
}
/**
* @since 9.2
*/
protected void startComponents() {
notifyComponentsOnStarted();
}
/**
* @throws InterruptedException
* @since 9.2
*/
protected void stopComponents(Instant deadline) throws InterruptedException {
ExecutorService executor = Executors.newSingleThreadExecutor();
try {
Future<?> future = executor.submit(() -> {
try {
notifyComponentsOnStopped(deadline);
} catch (InterruptedException cause) {
Thread.currentThread().interrupt();
throw new RuntimeException("Interrupted while stopping components", cause);
}
});
executor.shutdown();
try {
try {
future.get(Duration.between(Instant.now(), deadline).toMillis(), TimeUnit.MILLISECONDS);
} catch (TimeoutException cause) {
log.warn("Timed out on standby, blocking");
future.get();
}
} catch (ExecutionException cause) {
throw new RuntimeException("Errors caught while stopping components, giving up", cause);
}
} finally {
executor.shutdownNow();
}
}
@Override
public File getHome() {
return workingDir;
}
public void setHome(File home) {
workingDir = home;
}
@Override
public String getDescription() {
return toString();
}
@Override
public CryptoProperties getProperties() {
// do not unreference properties: some methods rely on this to set
// variables here...
return properties;
}
@Override
public String getProperty(String name) {
return getProperty(name, null);
}
@Override
public String getProperty(String name, String defValue) {
String value = properties.getProperty(name, defValue);
if (value == null || ("${" + name + "}").equals(value)) {
// avoid loop, don't expand
return value;
}
return expandVars(value);
}
@Override
public void setProperty(String name, Object value) {
properties.setProperty(name, value.toString());
}
@Override
public String toString() {
return getName() + " version " + getVersion();
}
@Override
public Object getComponent(String name) {
ComponentInstance co = getComponentInstance(name);
return co != null ? co.getInstance() : null;
}
@Override
public Object getComponent(ComponentName name) {
ComponentInstance co = getComponentInstance(name);
return co != null ? co.getInstance() : null;
}
@Override
public ComponentInstance getComponentInstance(String name) {
return manager.getComponent(new ComponentName(name));
}
@Override
public ComponentInstance getComponentInstance(ComponentName name) {
return manager.getComponent(name);
}
@Override
public ComponentManager getComponentManager() {
return manager;
}
@Override
public RuntimeContext getContext() {
return context;
}
protected void startExtensions() {
for (RuntimeExtension ext : extensions) {
ext.start();
}
}
protected void stopExtensions() {
for (RuntimeExtension ext : extensions) {
ext.stop();
}
}
protected void resumeExtensions() {
for (RuntimeExtension ext : extensions) {
ext.resume();
}
}
protected void standbyExtensions() {
for (RuntimeExtension ext : extensions) {
ext.standby();
}
}
@Override
public <T> T getService(Class<T> serviceClass) {
return manager.getService(serviceClass);
}
@Override
public String expandVars(String expression) {
return new TextTemplate(properties).processText(expression);
}
@Override
public File getBundleFile(Bundle bundle) {
return null;
}
@Override
public Bundle getBundle(String symbolicName) {
throw new UnsupportedOperationException("Not implemented");
}
/**
* @since 5.5
* @param msg
* summary message about all components loading status
* @return true if there was no detected error, else return false
*/
@Override
public boolean getStatusMessage(StringBuilder msg) {
String hr = "======================================================================";
if (!warnings.isEmpty()) {
msg.append(hr).append("\n= Component Loading Warnings:\n");
for (String warning : warnings) {
msg.append(" * ").append(warning).append('\n');
}
}
if (!errors.isEmpty()) {
msg.append(hr).append("\n= Component Loading Errors:\n");
for (String error : errors) {
msg.append(" * ").append(error).append('\n');
}
}
Map<ComponentName, Set<ComponentName>> pendingRegistrations = manager.getPendingRegistrations();
Map<ComponentName, Set<Extension>> missingRegistrations = manager.getMissingRegistrations();
Collection<ComponentName> unstartedRegistrations = manager.getActivatingRegistrations();
unstartedRegistrations.addAll(manager.getStartFailureRegistrations());
msg.append(hr).append("\n= Component Loading Status: Pending: ").append(pendingRegistrations.size())
.append(" / Missing: ").append(missingRegistrations.size()).append(" / Unstarted: ")
.append(unstartedRegistrations.size()).append(" / Total: ").append(manager.getRegistrations().size())
.append('\n');
for (Entry<ComponentName, Set<ComponentName>> e : pendingRegistrations.entrySet()) {
msg.append(" * ").append(e.getKey()).append(" requires ").append(e.getValue()).append('\n');
}
for (Entry<ComponentName, Set<Extension>> e : missingRegistrations.entrySet()) {
msg.append(" * ").append(e.getKey()).append(" references missing ")
.append(e.getValue().stream().map(
ext -> "target=" + ext.getTargetComponent().getName() + ";point=" + ext.getExtensionPoint())
.collect(Collectors.toList()))
.append('\n');
}
for (ComponentName componentName : unstartedRegistrations) {
msg.append(" - ").append(componentName).append('\n');
}
msg.append(hr);
return (errors.isEmpty() && pendingRegistrations.isEmpty() && missingRegistrations.isEmpty()
&& unstartedRegistrations.isEmpty());
}
/**
* Error logger which does its logging from a separate thread, for thread isolation.
*
* @param message
* the message to log
* @return a thread that can be started to do the logging
* @since 9.2, 8.10-HF05
*/
public static Thread getErrorLoggerThread(String message) {
return new Thread() {
@Override
public void run() {
log.error(message);
}
};
}
protected void notifyComponentsOnStarted() {
List<RegistrationInfo> ris = new ArrayList<>(manager.getRegistrations());
Collections.sort(ris, new RIApplicationStartedComparator());
for (RegistrationInfo ri : ris) {
try {
ri.notifyApplicationStarted();
} catch (RuntimeException e) {
log.error("Failed to notify component '" + ri.getName() + "' on application started", e);
}
}
}
protected void notifyComponentsOnStopped(Instant deadline) throws InterruptedException {
List<RegistrationInfo> ris = new ArrayList<>(manager.getRegistrations());
Collections.sort(ris, Collections.reverseOrder(new RIApplicationStartedComparator()));
for (RegistrationInfo ri : ris) {
try {
ri.notifyApplicationStopped(deadline);
} catch (InterruptedException cause) {
Thread.currentThread().interrupt();
throw new RuntimeException("Interrupted while stopping " + ri.getName() + ", giving up", cause);
} catch (RuntimeException e) {
log.error("Failed to notify component '" + ri.getName() + "' on application stand by", e);
}
}
}
}