How to use

getAndPutIfAbsent

method

in

org.apache.ignite.internal.processors.cache.IgniteInternalCache

  /** {@inheritDoc} */
  @Override protected void operation(int key) throws Exception {
    cache.getAndPutIfAbsent(key, key);
  }
}

/** {@inheritDoc} */
@Nullable @Override public V getAndPutIfAbsent(K key, V val) throws CacheException {
  IgniteInternalCache<K, V> delegate = getDelegateSafe();
  try {
    if (isAsync()) {
      setFuture(delegate.getAndPutIfAbsentAsync(key, val));
      return null;
    }
    else
      return delegate.getAndPutIfAbsent(key, val);
  }
  catch (IgniteCheckedException | IgniteException e) {
    throw cacheException(e);
  }
}

/** {@inheritDoc} */
@Nullable @Override public Object getAndPutIfAbsent(Object key, Object val) throws IgniteCheckedException {
  return delegate.get().getAndPutIfAbsent(keyTransformer.transform(key), val);
}

/** {@inheritDoc} */
@Nullable @Override public V getAndPutIfAbsent(K key, V val) throws CacheException {
  try {
    if (isAsync()) {
      setFuture(delegate.getAndPutIfAbsentAsync(key, val));
      return null;
    }
    else
      return delegate.getAndPutIfAbsent(key, val);
  }
  catch (IgniteCheckedException | IgniteException e) {
    throw cacheException(e);
  }
}

/** {@inheritDoc} */
@Nullable @Override public V getAndPutIfAbsent(K key, V val) throws IgniteCheckedException {
  CacheOperationContext prev = gate.enter(opCtx);
  try {
    return delegate.getAndPutIfAbsent(key, val);
  }
  finally {
    gate.leave(prev);
  }
}

/**
 * create system entry if it is absent.
 *
 * @param id System entry ID.
 * @return Value of created or existing system entry.
 * @throws IgniteCheckedException On error.
 */
private IgfsEntryInfo createSystemDirectoryIfAbsent(IgniteUuid id)
  throws IgniteCheckedException {
  assert IgfsUtils.isRootOrTrashId(id);
  IgfsEntryInfo info = IgfsUtils.createDirectory(id);
  IgfsEntryInfo oldInfo = id2InfoPrj.getAndPutIfAbsent(id, info);
  if (oldInfo != null)
    info = oldInfo;
  return info;
}

/**
 * Saves task name metadata to utility cache.
 *
 * @param taskName Task name.
 * @throws IgniteCheckedException If failed.
 */
private void saveTaskMetadata(String taskName) throws IgniteCheckedException {
  if (ctx.isDaemon())
    return;
  assert ctx.security().enabled();
  int nameHash = taskName.hashCode();
  // 0 is reserved for no task.
  if (nameHash == 0)
    nameHash = 1;
  GridTaskNameHashKey key = new GridTaskNameHashKey(nameHash);
  IgniteInternalCache<GridTaskNameHashKey, String> tasksMetaCache = taskMetaCache();
  String existingName = tasksMetaCache.get(key);
  if (existingName == null)
    existingName = tasksMetaCache.getAndPutIfAbsent(key, taskName);
  if (existingName != null && !F.eq(existingName, taskName))
    throw new IgniteCheckedException("Task name hash collision for security-enabled node " +
      "[taskName=" + taskName +
      ", existing taskName=" + existingName + ']');
}

hdr = new GridCacheSetHeader(IgniteUuid.randomUuid(), collocated, separated);
GridCacheSetHeader old = (GridCacheSetHeader)cache.getAndPutIfAbsent(key, hdr);

GridServiceDeployment dep = (GridServiceDeployment)serviceCache().getAndPutIfAbsent(key,
  new GridServiceDeployment(ctx.localNodeId(), cfg));

hdr = new GridCacheQueueHeader(IgniteUuid.randomUuid(), cap, colloc, 0, 0, null);
GridCacheQueueHeader old = queueHdrView.withNoRetries().getAndPutIfAbsent(key, hdr);

oldVal = metaCache.getAndPutIfAbsent(new GridCacheInternalKeyImpl(name, grpName), newVal);

perfCntr.onJobStart(jobStart);
if (jobMetaCache().getAndPutIfAbsent(jobId, meta) != null)
  throw new IgniteCheckedException("Failed to submit job. Job with the same ID already exists: " + jobId);

/**
 * @throws Exception If failed.
 */
@Test
public void testSystemTxInsideUserTx() throws Exception {
  Assume.assumeFalse("https://issues.apache.org/jira/browse/IGNITE-10473", MvccFeatureChecker.forcedMvcc());
  IgniteKernal ignite = (IgniteKernal)grid(0);
  IgniteCache<Object, Object> jcache = ignite.cache(DEFAULT_CACHE_NAME);
  try (Transaction tx = ignite.transactions().txStart(PESSIMISTIC, REPEATABLE_READ)) {
    jcache.get("1");
    jcache.put("1", "11");
    IgniteInternalCache<Object, Object> utilityCache = ignite.context().cache().utilityCache();
    utilityCache.getAndPutIfAbsent("2", "2");
    try (GridNearTxLocal itx = utilityCache.txStartEx(PESSIMISTIC, REPEATABLE_READ)) {
      assertEquals(null, utilityCache.get("1"));
      assertEquals("2", utilityCache.get("2"));
      assertEquals(null, utilityCache.get("3"));
      utilityCache.getAndPut("3", "3");
      itx.commit();
    }
    jcache.put("2", "22");
    tx.commit();
  }
  checkTransactionsCommitted();
  checkEntries(DEFAULT_CACHE_NAME, "1", "11", "2", "22", "3", null);
  checkEntries(CU.UTILITY_CACHE_NAME, "1", null, "2", "2", "3", "3");
}

  /** {@inheritDoc} */
  @Override protected void operation(int key) throws Exception {
    cache.getAndPutIfAbsent(key, key);
  }
}

/** {@inheritDoc} */
@Nullable @Override public V getAndPutIfAbsent(K key, V val) throws IgniteCheckedException {
  CacheOperationContext prev = gate.enter(opCtx);
  try {
    return delegate.getAndPutIfAbsent(key, val);
  }
  finally {
    gate.leave(prev);
  }
}

/**
 * create system entry if it is absent.
 *
 * @param id System entry ID.
 * @return Value of created or existing system entry.
 * @throws IgniteCheckedException On error.
 */
private IgfsEntryInfo createSystemDirectoryIfAbsent(IgniteUuid id)
  throws IgniteCheckedException {
  assert IgfsUtils.isRootOrTrashId(id);
  IgfsEntryInfo info = IgfsUtils.createDirectory(id);
  IgfsEntryInfo oldInfo = id2InfoPrj.getAndPutIfAbsent(id, info);
  if (oldInfo != null)
    info = oldInfo;
  return info;
}

/**
 * Saves task name metadata to utility cache.
 *
 * @param taskName Task name.
 * @throws IgniteCheckedException If failed.
 */
private void saveTaskMetadata(String taskName) throws IgniteCheckedException {
  if (ctx.isDaemon())
    return;
  assert ctx.security().enabled();
  int nameHash = taskName.hashCode();
  // 0 is reserved for no task.
  if (nameHash == 0)
    nameHash = 1;
  GridTaskNameHashKey key = new GridTaskNameHashKey(nameHash);
  IgniteInternalCache<GridTaskNameHashKey, String> tasksMetaCache = taskMetaCache();
  String existingName = tasksMetaCache.get(key);
  if (existingName == null)
    existingName = tasksMetaCache.getAndPutIfAbsent(key, taskName);
  if (existingName != null && !F.eq(existingName, taskName))
    throw new IgniteCheckedException("Task name hash collision for security-enabled node " +
      "[taskName=" + taskName +
      ", existing taskName=" + existingName + ']');
}

hdr = new GridCacheSetHeader(IgniteUuid.randomUuid(), collocated, separated);
GridCacheSetHeader old = (GridCacheSetHeader)cache.getAndPutIfAbsent(key, hdr);

GridServiceDeployment dep = (GridServiceDeployment)serviceCache().getAndPutIfAbsent(key,
  new GridServiceDeployment(ctx.localNodeId(), cfg));

oldVal = metaCache.getAndPutIfAbsent(new GridCacheInternalKeyImpl(name, grpName), newVal);