com.datastax.driver.core.policies.ConstantReconnectionPolicy Maven / Gradle / Ivy
/*
* Copyright DataStax, Inc.
*
* Licensed 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 com.datastax.driver.core.policies;
import com.datastax.driver.core.Cluster;
/** A reconnection policy that waits a constant time between each reconnection attempt. */
public class ConstantReconnectionPolicy implements ReconnectionPolicy {
private final long delayMs;
/**
* Creates a reconnection policy that creates with the provided constant wait time between
* reconnection attempts.
*
* @param constantDelayMs the constant delay in milliseconds to use.
*/
public ConstantReconnectionPolicy(long constantDelayMs) {
if (constantDelayMs < 0)
throw new IllegalArgumentException(
String.format("Invalid negative delay (got %d)", constantDelayMs));
this.delayMs = constantDelayMs;
}
/**
* The constant delay used by this reconnection policy.
*
* @return the constant delay used by this reconnection policy.
*/
public long getConstantDelayMs() {
return delayMs;
}
/**
* A new schedule that uses a constant {@code getConstantDelayMs()} delay between reconnection
* attempt.
*
* @return the newly created schedule.
*/
@Override
public ReconnectionSchedule newSchedule() {
return new ConstantSchedule();
}
private class ConstantSchedule implements ReconnectionSchedule {
@Override
public long nextDelayMs() {
return delayMs;
}
}
@Override
public void init(Cluster cluster) {
// nothing to do
}
@Override
public void close() {
// nothing to do
}
}