/*
* Copyright 2016 NAVER Corp.
*
* 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.navercorp.pinpoint.web.batch.job;
import com.navercorp.pinpoint.web.service.AgentInfoService;
import com.navercorp.pinpoint.web.vo.ApplicationAgentList;
import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.StepExecution;
import org.springframework.batch.core.StepExecutionListener;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.NonTransientResourceException;
import org.springframework.batch.item.ParseException;
import org.springframework.batch.item.UnexpectedInputException;
import org.springframework.beans.factory.annotation.Autowired;
import java.util.LinkedList;
import java.util.Queue;
/**
* @author Taejin Koo
*/
public class AgentCountReader implements ItemReader<ApplicationAgentList>, StepExecutionListener {
@Autowired
private AgentInfoService agentInfoService;
private final Queue<ApplicationAgentList> queue = new LinkedList<>();
@Override
public void beforeStep(StepExecution stepExecution) {
ApplicationAgentList applicationAgentList = agentInfoService.getApplicationAgentList(ApplicationAgentList.Key.APPLICATION_NAME);
queue.add(applicationAgentList);
}
@Override
public ApplicationAgentList read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {
return queue.poll();
}
@Override
public ExitStatus afterStep(StepExecution stepExecution) {
return null;
}
}