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package com.sun.enterprise.v3.admin;
import java.io.File;
import java.util.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Logger;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.config.serverbeans.ManagedJobConfig;
import com.sun.enterprise.util.LocalStringManagerImpl;
import com.sun.logging.LogDomains;
import org.glassfish.api.admin.Job;
import org.glassfish.api.admin.JobManager;
import org.glassfish.api.admin.AdminCommandState;
import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.api.admin.progress.JobInfo;
import org.glassfish.api.admin.progress.JobInfos;
import org.glassfish.hk2.api.PostConstruct;
import org.jvnet.hk2.annotations.Service;
import javax.inject.Inject;
import javax.inject.Singleton;
import javax.security.auth.Subject;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
/**
* This is the implementation for the JobManagerService
* The JobManager is responsible
* 1. generating unique ids for jobs
* 2. serving as a registry for jobs
* 3. creating threadpools for jobs
* 4.removing expired jobs
*
* @author Martin Mares
* @author Bhakti Mehta
*/
@Service
@Singleton
public class JobManagerService implements JobManager,PostConstruct {
@Inject
private Domain domain;
private ManagedJobConfig managedJobConfig;
private static final int MAX_SIZE = 65535;
private HashMap<String, Job> jobRegistry = new HashMap<String, Job>();
private AtomicInteger lastId = new AtomicInteger(0);
private static final LocalStringManagerImpl adminStrings =
new LocalStringManagerImpl(JobManagerService.class);
private final static Logger logger = LogDomains.getLogger(JobManagerService.class, LogDomains.ADMIN_LOGGER);
@Inject
private ExecutorService pool;
@Inject
private ServerEnvironment serverEnvironment;
private final String JOBS_FILE = "jobs.xml";
private JAXBContext jaxbContext;
/**
* This will return a new id which is unused
* @return
*/
protected synchronized String getNewId() {
int nextId = lastId.incrementAndGet();
if (nextId > MAX_SIZE) {
reset();
}
String nextIdToUse = String.valueOf(nextId);
return !idInUse(nextIdToUse) ? String.valueOf(nextId): getNewId();
}
public JobInfo getCompletedJobForId(String id) {
for (JobInfo jobInfo: getCompletedJobs().getJobInfoList()) {
if (jobInfo.jobId.equals(id)) {
return jobInfo;
}
}
return null;
}
/**
* This resets the id to 0
*/
private void reset() {
lastId.set(0);
}
/**
* This method will return if the id is in use
* @param id
* @return true if id is in use
*/
private boolean idInUse(String id) {
if (jobRegistry.containsKey(id)) {
return true;
}
if (getCompletedJobs() != null) {
for (JobInfo job : getCompletedJobs().getJobInfoList()) {
if ((job.jobId).equals(id)) {
return true;
}
}
}
return false;
}
/**
* This will create a new job with the name of command and a new unused id for the job
*
*
* @param scope
* @param name The name of the command
* @return a newly created job
*/
@Override
public Job createJob(String scope, String name, Subject subject,boolean isManagedJob) {
if (isManagedJob) {
return new AdminCommandInstanceImpl(getNewId(),name,scope,subject,true);
} else {
return new AdminCommandInstanceImpl(name,scope,subject,false);
}
}
/**
* This adds the jobs
* @param instance
* @throws IllegalArgumentException
*/
@Override
public synchronized void registerJob(Job instance) throws IllegalArgumentException {
if (instance == null) {
throw new IllegalArgumentException(adminStrings.getLocalString("job.cannot.be.null","Job cannot be null"));
}
if (jobRegistry.containsKey(instance.getId())) {
throw new IllegalArgumentException(adminStrings.getLocalString("job.id.in.use","Job id is already in use."));
}
jobRegistry.put(instance.getId(), instance);
if (instance instanceof AdminCommandInstanceImpl) {
((AdminCommandInstanceImpl) instance).setState(AdminCommandState.State.RUNNING);
}
}
/**
* This returns all the jobs in the registry
* @return The iterator of jobs
*/
@Override
public Iterator<Job> getJobs() {
return jobRegistry.values().iterator();
}
/**
* This will return a job associated with the id
* @param id The job whose id matches
* @return
*/
@Override
public Job get(String id) {
return jobRegistry.get(id);
}
/**
* This will return a list of jobs which have crossed the JOBS_RETENTION_PERIOD
* and need to be purged
* @return list of jobs to be purged
*/
public ArrayList<Job> getExpiredJobs() {
ArrayList expiredJobs = new ArrayList();
Iterator<Job> jobs = getJobs();
while ( jobs.hasNext()) {
Job job = jobs.next();
long executedTime = job.getCommandExecutionDate();
long currentTime = System.currentTimeMillis();
long jobsRetentionPeriod = 86400000;
boolean enableJobManager = Boolean.parseBoolean(System.getProperty("enableJobManager"));
if (enableJobManager) {
managedJobConfig = domain.getExtensionByType(ManagedJobConfig.class);
jobsRetentionPeriod = convert(managedJobConfig.getJobRetentionPeriod());
}
if (currentTime - executedTime > jobsRetentionPeriod &&
job.getState().equals(AdminCommandState.State.COMPLETED)) {
expiredJobs.add(job);
}
}
return expiredJobs;
}
public long convert(String input ) {
String period = input.substring(0,input.length()-1);
Long timeInterval = new Long(period);
String s = input.toLowerCase();
long milliseconds = 86400000;
if (s.indexOf("s") > 0 ) {
milliseconds = timeInterval*1000;
}
else if (s.indexOf("h") > 0 ) {
milliseconds = timeInterval*3600*1000;
}
else if (s.indexOf("m") > 0 ) {
milliseconds = timeInterval*60*1000;
}
return milliseconds;
}
/**
* This will remove the job from the registry
* @param id The job id of the job to be removed
*/
@Override
public synchronized void purgeJob(String id) {
Job obj = jobRegistry.remove(id);
logger.fine(adminStrings.getLocalString("removed.expired.job","Removed expired job ", obj));
}
public ExecutorService getThreadPool() {
return pool ;
}
/**
* This will load the jobs which have already completed
* and persisted in the jobs.xml
* @return JobsInfos which contains information about completed jobs
*/
public synchronized JobInfos getCompletedJobs() {
try {
File file =
new File(serverEnvironment.getConfigDirPath(),JOBS_FILE);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
if (file != null && file.exists()) {
JobInfos jobInfos = (JobInfos)unmarshaller.unmarshal(file);
return jobInfos;
}
} catch (JAXBException e) {
throw new RuntimeException(adminStrings.getLocalString("error.reading.completed.jobs","Error reading completed jobs ", e.getLocalizedMessage()));
}
return null;
}
private static JAXBContext initContext() throws JAXBException {
return JAXBContext.newInstance(JobInfos.class);
}
@Override
public void postConstruct() {
try {
jaxbContext = initContext();
} catch (JAXBException e) {
throw new RuntimeException(adminStrings.getLocalString("error.initializing.job.manager.service","Error initializing Job Manager service {0} ", e.getLocalizedMessage()));
}
}
public JAXBContext getJAXBContext() {
return jaxbContext;
}
}