org.springframework.integration.leader.AbstractCandidate.java Source code

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Here is the source code for org.springframework.integration.leader.AbstractCandidate.java

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/*
 * Copyright 2015-2019 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.integration.leader;

import java.util.UUID;

import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;

/**
 * Base implementation of a {@link Candidate}.
 *
 * @author Janne Valkealahti
 * @author Gary Russell
 *
 */
public abstract class AbstractCandidate implements Candidate {

    private static final String DEFAULT_ROLE = "leader";

    private final String id;

    private final String role;

    /**
     * Instantiate a abstract candidate.
     */
    public AbstractCandidate() {
        this(null, null);
    }

    /**
     * Instantiate a abstract candidate.
     *
     * @param id the identifier
     * @param role the role
     */
    public AbstractCandidate(@Nullable String id, @Nullable String role) {
        this.id = StringUtils.hasText(id) ? id : UUID.randomUUID().toString();
        this.role = StringUtils.hasText(role) ? role : DEFAULT_ROLE;
    }

    @Override
    public String getRole() {
        return this.role;
    }

    @Override
    public String getId() {
        return this.id;
    }

    @Override
    public abstract void onGranted(Context ctx) throws InterruptedException;

    @Override
    public abstract void onRevoked(Context ctx);

}