org.apache.flink.runtime.registration.RegistrationResponse Maven / Gradle / Ivy
/*
* 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.flink.runtime.registration;
import java.io.Serializable;
/**
* Base class for responses given to registration attempts from {@link RetryingRegistration}.
*/
public abstract class RegistrationResponse implements Serializable {
private static final long serialVersionUID = 1L;
// ----------------------------------------------------------------------------
/**
* Base class for a successful registration. Concrete registration implementations
* will typically extend this class to attach more information.
*/
public static class Success extends RegistrationResponse {
private static final long serialVersionUID = 1L;
@Override
public String toString() {
return "Registration Successful";
}
}
// ----------------------------------------------------------------------------
/**
* A rejected (declined) registration.
*/
public static final class Decline extends RegistrationResponse {
private static final long serialVersionUID = 1L;
/** The rejection reason. */
private final String reason;
/**
* Creates a new rejection message.
*
* @param reason The reason for the rejection.
*/
public Decline(String reason) {
this.reason = reason != null ? reason : "(unknown)";
}
/**
* Gets the reason for the rejection.
*/
public String getReason() {
return reason;
}
@Override
public String toString() {
return "Registration Declined (" + reason + ')';
}
}
}