Example usage for java.util.concurrent.locks Lock unlock

List of usage examples for java.util.concurrent.locks Lock unlock

  1. HOME
  2. Java
  3. java
  4. java.util.concurrent.locks.*
  5. Lock
  6. unlock

Introduction

In this page you can find the example usage for java.util.concurrent.locks Lock unlock.

Prototype

void unlock();

Source Link

Document

Releases the lock.

Usage

From source file:gridool.db.sql.ParallelSQLExecJob.java

private static String invokeCsvOutputReduce(final Connection conn, final String reduceQuery,
        final String outputTableName, final ReadWriteLock rwlock, final Timings timings) throws GridException {
    File colDir = GridUtils.getWorkDir(true);
    final File outFile = new File(colDir, outputTableName + ".csv");
    final CsvWriter writer = new CsvWriter(outFile);
    final MutableBoolean first = new MutableBoolean(true);
    final MutableLong ansGenStart = new MutableLong(-1L);
    final ResultSetHandler rsh = new ResultSetHandler() {
        public Object handle(ResultSet rs) throws SQLException {
            if (first.getBoolean()) {
                ansGenStart.setValue(System.currentTimeMillis());
                first.setBoolean(false);
            }//from   w  w w  .j  ava  2 s  . co  m
            int numRows = writer.writeAll(rs, MONETDB_NULL_STRING, false);
            if (LOG.isInfoEnabled()) {
                LOG.info("Result row count: " + numRows);
            }
            return null;
        }
    };

    if (LOG.isInfoEnabled()) {
        LOG.info("Executing a Reduce SQL query: \n" + reduceQuery);
    }
    final Lock rlock = rwlock.readLock();
    try {
        rlock.lock();
        conn.setReadOnly(true);
        JDBCUtils.query(conn, reduceQuery, rsh);
    } catch (SQLException e) {
        String errmsg = "failed running a reduce query: " + reduceQuery;
        LOG.error(errmsg, e);
        try {
            conn.rollback();
        } catch (SQLException rbe) {
            LOG.warn("Rollback failed", rbe);
        }
        throw new GridException(errmsg, e);
    } finally {
        rlock.unlock();
        writer.close();
    }

    long answerGenStart = ansGenStart.getValue();
    long answerGenTime = (answerGenStart == -1L) ? 0L : System.currentTimeMillis() - answerGenStart;
    timings.setAnswerGenerationTime(answerGenTime);

    if (!outFile.exists()) {
        throw new IllegalStateException("Output file does not exist:" + outFile.getAbsolutePath());
    }
    return outFile.getAbsolutePath();
}

From source file:gridool.db.sql.ParallelSQLExecJob.java

private static String invokeStringOutputReduce(final Connection conn, final String reduceQuery,
        final ReadWriteLock rwlock) throws GridException {
    final ResultSetHandler rsh = new ResultSetHandler() {
        public String handle(ResultSet rs) throws SQLException {
            if (rs.next()) {
                String firstResult = rs.getString(1);
                return firstResult;
            }//  w  ww  . jav  a2  s  . c o m
            return null;
        }
    };

    if (LOG.isInfoEnabled()) {
        LOG.info("Executing a Reduce SQL query: \n" + reduceQuery);
    }
    final String result;
    final Lock rlock = rwlock.readLock();
    try {
        rlock.lock();
        conn.setReadOnly(true);
        result = (String) JDBCUtils.query(conn, reduceQuery, rsh);
    } catch (SQLException e) {
        String errmsg = "failed running a reduce query: " + reduceQuery;
        LOG.error(errmsg, e);
        try {
            conn.rollback();
        } catch (SQLException rbe) {
            LOG.warn("Rollback failed", rbe);
        }
        throw new GridException(errmsg, e);
    } finally {
        rlock.unlock();
    }
    return result;
}

From source file:org.rhq.core.pc.PluginContainer.java

private void releaseLock(Lock lock) {
    if (lock != null) {
        lock.unlock();
    }
}

From source file:org.springframework.integration.jdbc.lock.JdbcLockRegistryDifferentClientTests.java

@Test
public void testOnlyOneLock() throws Exception {

    for (int i = 0; i < 100; i++) {

        final List<String> locked = new ArrayList<String>();
        final CountDownLatch latch = new CountDownLatch(20);
        ExecutorService pool = Executors.newFixedThreadPool(6);
        ArrayList<Callable<Boolean>> tasks = new ArrayList<Callable<Boolean>>();
        for (int j = 0; j < 20; j++) {
            final DefaultLockRepository client = new DefaultLockRepository(this.dataSource);
            client.afterPropertiesSet();
            this.context.getAutowireCapableBeanFactory().autowireBean(client);
            Callable<Boolean> task = () -> {
                Lock lock = new JdbcLockRegistry(client).obtain("foo");
                try {
                    if (locked.isEmpty() && lock.tryLock()) {
                        if (locked.isEmpty()) {
                            locked.add("done");
                            return true;
                        }/*from   w w w .  j a  va  2 s .c o m*/
                    }
                } finally {
                    try {
                        lock.unlock();
                    } catch (Exception e) {
                        // ignore
                    }
                    latch.countDown();
                }
                return false;
            };
            tasks.add(task);
        }
        logger.info("Starting: " + i);
        pool.invokeAll(tasks);

        assertTrue(latch.await(10, TimeUnit.SECONDS));
        // eventually they both get the lock and release it
        assertEquals(1, locked.size());
        assertTrue(locked.contains("done"));

    }

}

From source file:DemandCache.java

/**
 * Performs an access operation on a cache item, causing it to live longer in the cache
 * //w w w  .  j a va 2s .c  om
 * @param key The key of the item to access
 * @param weight The weight of the access--higher weight will result in a more persistent cache
 *        item. 1-10 are supported. A guideline is that the cache item will survive longer by
 *        {@link #getHalfLife()} <code>weight</code>.
 * @see #ACCESS_GET
 * @see #ACCESS_SET
 */
public void access(K key, int weight) {
    Lock lock = theLock.readLock();
    lock.lock();
    try {
        CacheValue value = theCache.get(key);
        if (value != null)
            _access(value, weight);
    } finally {
        lock.unlock();
    }
}

From source file:com.mastfrog.netty.http.client.CookieStore.java

@Override
public Iterator<Cookie> iterator() {
    Lock readLock = lock.readLock();
    List<Cookie> cks = new ArrayList<Cookie>();
    readLock.lock();//from ww  w  .j  av  a2s  . co m
    try {
        cks.addAll(cookies);
    } finally {
        readLock.unlock();
    }
    Collections.sort(cks);
    return cks.iterator();
}

From source file:com.cloudera.oryx.ml.serving.als.model.ALSServingModel.java

void setUserVector(String user, float[] vector) {
    Preconditions.checkNotNull(vector);//from   w w  w  . j a  v a 2 s .  c  o m
    Preconditions.checkArgument(vector.length == features);
    Lock lock = xLock.writeLock();
    lock.lock();
    try {
        if (X.put(user, vector) == null) {
            // User was actually new
            recentNewUsers.add(user);
        }
    } finally {
        lock.unlock();
    }
}

From source file:com.cip.crane.agent.sheduler.KillTaskThread.java

@Override
public void run() {
    Lock lock = LockHelper.getLock(jobInstanceId);
    try {//from ww w  .j a va 2 s .  c  o m
        lock.lock();

        ScheduleConf conf = (ScheduleConf) cs.getConf(localIp, jobInstanceId);

        ScheduleStatus status = (ScheduleStatus) cs.getStatus(localIp, jobInstanceId);

        LOGGER.info("KILL TASK THREAD|jobInstanceId:" + jobInstanceId + "| ip:" + localIp + "  |conf:" + conf
                + "  |status:" + status);

        if (conf != null && status != null) {
            killTask(localIp, conf, status);
        }

    } catch (Exception e) {
        LOGGER.error(e, e);
    } finally {
        lock.unlock();
    }
}

From source file:org.apache.lucene.gdata.search.index.IndexController.java

private void createNewDeleteAllEntriesTask(final ServerBaseFeed feed) {
    checkDestroyed();// w  w w. ja va  2s  .  co m
    checkInitialized();
    if (LOG.isInfoEnabled())
        LOG.info("Deleting all entries for feed dispatch new IndexDocumentBuilder -- " + feed.getId());
    String serviceName = feed.getServiceConfig().getName();
    ServiceIndex bean = this.indexerMap.get(serviceName);
    if (bean == null)
        throw new RuntimeException("no indexer for service " + serviceName + " registered");
    Lock lock = bean.getLock();
    lock.lock();
    try {
        IndexDocumentBuilder<IndexDocument> callable = new IndexFeedDeleteTask(feed.getId());
        sumbitTask(callable, bean.getIndexer());
    } finally {
        lock.unlock();
    }

}

From source file:com.mycollab.module.ecm.service.impl.DriveInfoServiceImpl.java

@Override
public void saveOrUpdateDriveInfo(@CacheKey DriveInfo driveInfo) {
    Integer sAccountId = driveInfo.getSaccountid();
    DriveInfoExample ex = new DriveInfoExample();
    ex.createCriteria().andSaccountidEqualTo(sAccountId);
    Lock lock = DistributionLockUtil.getLock("ecm-service" + sAccountId);
    try {//  ww  w .  j a v  a 2s . co m
        if (lock.tryLock(15, TimeUnit.SECONDS)) {
            if (driveInfoMapper.countByExample(ex) > 0) {
                driveInfo.setId(null);
                driveInfoMapper.updateByExampleSelective(driveInfo, ex);
            } else {
                driveInfoMapper.insert(driveInfo);
            }
        }
    } catch (Exception e) {
        LOG.error("Error while save drive info " + BeanUtility.printBeanObj(driveInfo), e);
    } finally {
        DistributionLockUtil.removeLock("ecm-service" + sAccountId);
        lock.unlock();
    }
}