How to use

tearDown

method

in

org.apache.hive.hcatalog.common.HiveClientCache$CacheableHiveMetaStoreClient

/**
 * Attempt to tear down the client connection.
 * The connection will be closed if the following conditions hold:
 *  1. There are no active user holding the client.
 *  2. The client has been evicted from the cache.
 */
public synchronized void tearDownIfUnused() {
 if (users.get() != 0) {
  LOG.warn("Non-zero user count preventing client tear down: users=" + users.get() + " expired=" + expiredFromCache);
 }
 if (users.get() == 0 && expiredFromCache) {
  this.tearDown();
 }
}

 /**
  * GC is attempting to destroy the object.
  * No one references this client anymore, so it can be torn down without worrying about user counts.
  * @throws Throwable
  */
 @Override
 protected void finalize() throws Throwable {
  if (users.get() != 0) {
   LOG.warn("Closing client with non-zero user count: users=" + users.get() + " expired=" + expiredFromCache);
  }
  try {
   this.tearDown();
  } finally {
   super.finalize();
  }
 }
}

/**
 * Attempt to tear down the client connection.
 * The connection will be closed if the following conditions hold:
 *  1. There are no active user holding the client.
 *  2. The client has been evicted from the cache.
 */
public synchronized void tearDownIfUnused() {
 if (users.get() != 0) {
  LOG.warn("Non-zero user count preventing client tear down: users=" + users.get() + " expired=" + expiredFromCache);
 }
 if (users.get() == 0 && expiredFromCache) {
  this.tearDown();
 }
}

 /**
  * GC is attempting to destroy the object.
  * No one references this client anymore, so it can be torn down without worrying about user counts.
  * @throws Throwable
  */
 @Override
 protected void finalize() throws Throwable {
  if (users.get() != 0) {
   LOG.warn("Closing client with non-zero user count: users=" + users.get() + " expired=" + expiredFromCache);
  }
  try {
   this.tearDown();
  } finally {
   super.finalize();
  }
 }
}

/**
 * Tear down only if
 *  1. There are no active user
 *  2. It has expired from the cache
 */
public void tearDownIfUnused() {
 if (users.get() == 0 && expiredFromCache) {
  this.tearDown();
 }
}

/**
 * Tear down only if
 *  1. There are no active user
 *  2. It has expired from the cache
 */
public void tearDownIfUnused() {
 if (users.get() == 0 && expiredFromCache) {
  this.tearDown();
 }
}

 /**
  * Last effort to clean up, may not even get called.
  * @throws Throwable
  */
 @Override
 protected void finalize() throws Throwable {
  try {
   this.tearDown();
  } finally {
   super.finalize();
  }
 }
}

 /**
  * Last effort to clean up, may not even get called.
  * @throws Throwable
  */
 @Override
 protected void finalize() throws Throwable {
  try {
   this.tearDown();
  } finally {
   super.finalize();
  }
 }
}

 /**
  * Last effort to clean up, may not even get called.
  * @throws Throwable
  */
 @Override
 protected void finalize() throws Throwable {
  try {
   this.tearDown();
  } finally {
   super.finalize();
  }
 }
}

/**
 * Tear down only if
 *  1. There are no active user
 *  2. It has expired from the cache
 */
public void tearDownIfUnused() {
 if (users.get() == 0 && expiredFromCache) {
  this.tearDown();
 }
}