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com.aspectran.core.service.AbstractCoreService Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2022 The Aspectran Project
*
* 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 com.aspectran.core.service;
import com.aspectran.core.activity.Activity;
import com.aspectran.core.context.ActivityContext;
import com.aspectran.core.context.InsufficientEnvironmentException;
import com.aspectran.core.context.builder.ActivityContextBuilder;
import com.aspectran.core.context.builder.ActivityContextBuilderException;
import com.aspectran.core.context.builder.HybridActivityContextBuilder;
import com.aspectran.core.context.config.AspectranConfig;
import com.aspectran.core.context.config.ContextConfig;
import com.aspectran.core.context.config.ExposalsConfig;
import com.aspectran.core.context.config.SchedulerConfig;
import com.aspectran.core.context.config.SystemConfig;
import com.aspectran.core.context.resource.AspectranClassLoader;
import com.aspectran.core.scheduler.service.QuartzSchedulerService;
import com.aspectran.core.scheduler.service.SchedulerService;
import com.aspectran.core.util.Assert;
import com.aspectran.core.util.FileLocker;
import com.aspectran.core.util.ShutdownHook;
import com.aspectran.core.util.SystemUtils;
import com.aspectran.core.util.logging.Logger;
import com.aspectran.core.util.logging.LoggerFactory;
import com.aspectran.core.util.wildcard.PluralWildcardPattern;
import java.io.File;
import java.io.IOException;
import static com.aspectran.core.context.config.AspectranConfig.BASE_PATH_PROPERTY_NAME;
/**
* The Class AbstractCoreService.
*/
public abstract class AbstractCoreService extends AbstractServiceController implements CoreService {
private final Logger logger = LoggerFactory.getLogger(getClass());
private final CoreService rootService;
private final boolean lateStart;
private String basePath;
private AspectranConfig aspectranConfig;
private PluralWildcardPattern exposableTransletNamesPattern;
private ActivityContextBuilder activityContextBuilder;
private ActivityContext activityContext;
private SchedulerService schedulerService;
private FileLocker fileLocker;
public AbstractCoreService() {
this(null);
}
public AbstractCoreService(CoreService rootService) {
super(true);
if (rootService != null) {
Assert.state(rootService.getActivityContext() != null,
"Oops! No ActivityContext configured");
this.rootService = rootService;
this.activityContext = rootService.getActivityContext();
this.aspectranConfig = rootService.getAspectranConfig();
this.lateStart = rootService.getServiceController().isActive();
setBasePath(rootService.getBasePath());
rootService.joinDerivedService(this);
} else {
this.rootService = null;
this.lateStart = false;
}
}
@Override
public String getBasePath() {
return basePath;
}
protected void setBasePath(String basePath) {
this.basePath = basePath;
}
@Override
public boolean isLateStart() {
return lateStart;
}
@Override
public boolean isHardReload() {
Assert.state(activityContextBuilder != null,
"No ActivityContextLoader configured; First, call the prepare() method");
return activityContextBuilder.isHardReload();
}
@Override
public ServiceController getServiceController() {
return this;
}
@Override
public void joinDerivedService(CoreService coreService) {
super.joinDerivedService(coreService.getServiceController());
}
@Override
public void withdrawDerivedService(CoreService coreService) {
Assert.state(coreService.isDerived(), "Not derived service: " + coreService);
Assert.state(!coreService.getServiceController().isActive(), "Not stopped service: " + coreService);
super.withdrawDerivedService(coreService.getServiceController());
}
@Override
public void leaveFromRootService() {
Assert.state(isDerived(), "Not derived service: " + this);
Assert.state(!isActive(), "Not stopped service: " + this);
rootService.withdrawDerivedService(this);
}
@Override
public boolean isDerived() {
return (rootService != null);
}
protected boolean isExposable(String transletName) {
return (exposableTransletNamesPattern == null || exposableTransletNamesPattern.matches(transletName));
}
protected void setExposals(String[] includePatterns, String[] excludePatterns) {
if ((includePatterns != null && includePatterns.length > 0) ||
excludePatterns != null && excludePatterns.length > 0) {
exposableTransletNamesPattern = new PluralWildcardPattern(includePatterns, excludePatterns,
ActivityContext.NAME_SEPARATOR_CHAR);
}
}
protected void prepare(AspectranConfig aspectranConfig) throws AspectranServiceException {
Assert.state(activityContext == null, "ActivityContext is already configured");
try {
this.aspectranConfig = aspectranConfig;
SystemConfig systemConfig = aspectranConfig.getSystemConfig();
if (systemConfig != null) {
for (String key : systemConfig.getPropertyKeys()) {
String value = systemConfig.getProperty(key);
if (value != null) {
System.setProperty(key, value);
}
}
}
ContextConfig contextConfig = aspectranConfig.getContextConfig();
if (contextConfig != null) {
String basePath = contextConfig.getBasePath();
if (basePath != null) {
setBasePath(basePath);
}
boolean singleton = contextConfig.isSingleton();
if (singleton && !checkSingletonLock()) {
throw new InsufficientEnvironmentException("Another instance of Aspectran is already running; " +
"Only one instance is allowed (context.singleton is set to true)");
}
}
activityContextBuilder = new HybridActivityContextBuilder(this);
activityContextBuilder.setBasePath(getBasePath());
activityContextBuilder.setContextConfig(contextConfig);
activityContextBuilder.setServiceController(this);
schedulerService = createSchedulerService(aspectranConfig.getSchedulerConfig());
} catch (Exception e) {
throw new AspectranServiceException("Unable to prepare the service", e);
}
}
protected void loadActivityContext() throws ActivityContextBuilderException {
Assert.state(activityContextBuilder != null,
"No ActivityContextLoader configured; First, call the prepare() method");
Assert.state(activityContext == null,
"ActivityContext is already configured; Must destroy the current ActivityContext before reloading");
activityContextBuilder.build();
}
protected void destroyActivityContext() {
Assert.state(activityContextBuilder != null,
"No ActivityContextLoader configured; First, call the prepare() method");
activityContextBuilder.destroy();
}
@Override
public ActivityContext getActivityContext() {
return activityContext;
}
public void setActivityContext(ActivityContext activityContext) {
this.activityContext = activityContext;
}
@Override
public Activity getDefaultActivity() {
Assert.state(getActivityContext() != null,
"No ActivityContext configured yet");
return getActivityContext().getDefaultActivity();
}
@Override
public AspectranClassLoader getAspectranClassLoader() {
Assert.state(activityContextBuilder != null,
"No ActivityContextLoader configured; First, call the prepare() method");
return activityContextBuilder.getAspectranClassLoader();
}
@Override
public AspectranConfig getAspectranConfig() {
return aspectranConfig;
}
@Override
public SchedulerService getSchedulerService() {
return schedulerService;
}
private SchedulerService createSchedulerService(SchedulerConfig schedulerConfig) {
if (schedulerConfig == null) {
return null;
}
if (!schedulerConfig.isEnabled()) {
return null;
}
int startDelaySeconds = schedulerConfig.getStartDelaySeconds();
boolean waitOnShutdown = schedulerConfig.isWaitOnShutdown();
ExposalsConfig exposalsConfig = schedulerConfig.getExposalsConfig();
if (startDelaySeconds == -1) {
startDelaySeconds = 5;
if (logger.isDebugEnabled()) {
logger.debug("Scheduler option 'startDelaySeconds' is not specified, defaulting to 5 seconds");
}
}
QuartzSchedulerService schedulerService = new QuartzSchedulerService(this);
if (waitOnShutdown) {
schedulerService.setWaitOnShutdown(true);
}
schedulerService.setStartDelaySeconds(startDelaySeconds);
if (exposalsConfig != null) {
String[] includePatterns = exposalsConfig.getIncludePatterns();
String[] excludePatterns = exposalsConfig.getExcludePatterns();
schedulerService.setExposals(includePatterns, excludePatterns);
}
return schedulerService;
}
private boolean checkSingletonLock() throws Exception {
Assert.state(fileLocker == null, "Singleton lock is already configured");
try {
String basePath = getBasePath();
if (basePath == null) {
basePath = SystemUtils.getJavaIoTmpDir();
}
Assert.state(basePath != null,
"Unable to determine the directory where the lock file will be located");
fileLocker = new FileLocker(new File(basePath, ".lock"));
if (fileLocker.lock()) {
ShutdownHook.addTask(() -> {
if (fileLocker != null) {
try {
fileLocker.release();
fileLocker = null;
} catch (Exception e) {
logger.warn("Unable to release singleton lock: " + e);
}
}
});
return true;
} else {
return false;
}
} catch (Exception e) {
throw new Exception("Unable to acquire singleton lock", e);
}
}
protected void determineBasePath() {
try {
String baseDir = SystemUtils.getProperty(BASE_PATH_PROPERTY_NAME);
if (baseDir != null) {
File dir = new File(baseDir);
if (!dir.isDirectory()) {
throw new IOException("Make sure it is a valid base directory; " +
BASE_PATH_PROPERTY_NAME + "=" + baseDir);
}
} else {
baseDir = new File("").getCanonicalPath();
}
setBasePath(baseDir);
} catch (IOException e) {
throw new AspectranServiceException("Can not verify base directory");
}
}
}
