dubbo-registry-extensions/dubbo-registry-polaris/src/main/java/org/apache/dubbo/registry/polaris/task/WatchTask.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.dubbo.registry.polaris.task;

import com.tencent.polaris.api.listener.ServiceListener;
import com.tencent.polaris.api.pojo.ServiceChangeEvent;

public class WatchTask implements Runnable {

    private final String service;

    private final FetchTask fetchTask;

    private final ServiceListener serviceListener;

    private final TaskScheduler taskScheduler;

    public WatchTask(String service, FetchTask fetchTask, TaskScheduler taskScheduler) {
        this.service = service;
        this.fetchTask = fetchTask;
        this.serviceListener = new ServiceListener() {
            @Override
            public void onEvent(ServiceChangeEvent event) {
                taskScheduler.submitFetchTask(fetchTask);
            }
        };
        this.taskScheduler = taskScheduler;
    }

    @Override
    public void run() {
        boolean result = fetchTask.getPolarisOperator().watchService(service, serviceListener);
        if (result) {
            fetchTask.getHandler().onWatchSuccess(service, serviceListener);
            taskScheduler.submitFetchTask(fetchTask);
            return;
        }
        taskScheduler.submitWatchTask(this);
    }
}