/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.curator.ensemble.fixed;
import com.google.common.base.
Preconditions;
import com.google.common.base.
Strings;
import org.apache.curator.ensemble.
EnsembleProvider;
import org.apache.zookeeper.
ZooKeeper;
import java.io.
IOException;
import java.util.concurrent.atomic.
AtomicReference;
/**
* Standard ensemble provider that wraps a fixed connection string
*/
public class
FixedEnsembleProvider implements
EnsembleProvider
{
private final
AtomicReference<
String>
connectionString = new
AtomicReference<>();
private final boolean
updateServerListEnabled;
/**
* The connection string to use
*
* @param connectionString connection string
*/
public
FixedEnsembleProvider(
String connectionString)
{
this(
connectionString, true);
}
/**
* The connection string to use
*
* @param connectionString connection string
* @param updateServerListEnabled if true, allow Curator to call {@link ZooKeeper#updateServerList(String)}
*/
public
FixedEnsembleProvider(
String connectionString, boolean
updateServerListEnabled)
{
this.
updateServerListEnabled =
updateServerListEnabled;
Preconditions.
checkArgument(!
Strings.
isNullOrEmpty(
connectionString), "connectionString cannot be null or empty");
this.
connectionString.
set(
connectionString);
}
@
Override
public void
start() throws
Exception
{
// NOP
}
@
Override
public void
close() throws
IOException
{
// NOP
}
@
Override
public void
setConnectionString(
String connectionString)
{
this.
connectionString.
set(
connectionString);
}
@
Override
public
String getConnectionString()
{
return
connectionString.
get();
}
@
Override
public boolean
updateServerListEnabled()
{
return
updateServerListEnabled;
}
}