storm-server/src/main/java/org/apache/storm/scheduler/Component.java

/*
 * 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.storm.scheduler;

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.storm.generated.ComponentType;

public class Component {
    private final String id;
    private final List<ExecutorDetails> execs;
    private final ComponentType type;
    private final Set<String> parents = new HashSet<>();
    private final Set<String> children = new HashSet<>();

    /**
     * Create a new component.
     *
     * @param type   the type of component this is
     * @param compId the id of the component
     * @param execs  the executors for this component.
     */
    public Component(ComponentType type, String compId, List<ExecutorDetails> execs) {
        this.type = type;
        this.id = compId;
        this.execs = execs;
    }

    /**
     * Add a child link.
     *
     * @param child a child the consumes from this
     */
    public void addChild(Component child) {
        children.add(child.getId());
        child.parents.add(id);
    }

    public String getId() {
        return id;
    }

    public List<ExecutorDetails> getExecs() {
        return execs;
    }

    public ComponentType getType() {
        return type;
    }

    public Set<String> getParents() {
        return parents;
    }

    public Set<String> getChildren() {
        return children;
    }

    @Override
    public String toString() {
        return "{id: "
               + getId()
               + " Parents: "
               + getParents()
               + " Children: "
               + getChildren()
               + " Execs: "
               + getExecs()
               + "}";
    }
}