/*
* Copyright 1999-2015 dangdang.com.
* <p>
* 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.
* </p>
*/
package com.dangdang.ddframe.job.lite.internal.sharding;
import com.dangdang.ddframe.job.executor.ShardingContexts;
import com.dangdang.ddframe.job.lite.api.strategy.JobInstance;
import com.dangdang.ddframe.job.lite.config.LiteJobConfiguration;
import com.dangdang.ddframe.job.lite.internal.config.ConfigurationService;
import com.dangdang.ddframe.job.lite.internal.schedule.JobRegistry;
import com.dangdang.ddframe.job.lite.internal.storage.JobNodeStorage;
import com.dangdang.ddframe.job.reg.base.CoordinatorRegistryCenter;
import com.dangdang.ddframe.job.util.config.ShardingItemParameters;
import com.google.common.base.Joiner;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* 作业运行时上下文服务.
*
* @author zhangliang
*/
public final class ExecutionContextService {
private final String jobName;
private final JobNodeStorage jobNodeStorage;
private final ConfigurationService configService;
public ExecutionContextService(final CoordinatorRegistryCenter regCenter, final String jobName) {
this.jobName = jobName;
jobNodeStorage = new JobNodeStorage(regCenter, jobName);
configService = new ConfigurationService(regCenter, jobName);
}
/**
* 获取当前作业服务器分片上下文.
*
* @param shardingItems 分片项
* @return 分片上下文
*/
public ShardingContexts getJobShardingContext(final List<Integer> shardingItems) {
LiteJobConfiguration liteJobConfig = configService.load(false);
removeRunningIfMonitorExecution(liteJobConfig.isMonitorExecution(), shardingItems);
if (shardingItems.isEmpty()) {
return new ShardingContexts(buildTaskId(liteJobConfig, shardingItems), liteJobConfig.getJobName(), liteJobConfig.getTypeConfig().getCoreConfig().getShardingTotalCount(),
liteJobConfig.getTypeConfig().getCoreConfig().getJobParameter(), Collections.<Integer, String>emptyMap());
}
Map<Integer, String> shardingItemParameterMap = new ShardingItemParameters(liteJobConfig.getTypeConfig().getCoreConfig().getShardingItemParameters()).getMap();
return new ShardingContexts(buildTaskId(liteJobConfig, shardingItems), liteJobConfig.getJobName(), liteJobConfig.getTypeConfig().getCoreConfig().getShardingTotalCount(),
liteJobConfig.getTypeConfig().getCoreConfig().getJobParameter(), getAssignedShardingItemParameterMap(shardingItems, shardingItemParameterMap));
}
private String buildTaskId(final LiteJobConfiguration liteJobConfig, final List<Integer> shardingItems) {
JobInstance jobInstance = JobRegistry.getInstance().getJobInstance(jobName);
return Joiner.on("@-@").join(liteJobConfig.getJobName(), Joiner.on(",").join(shardingItems), "READY",
null == jobInstance.getJobInstanceId() ? "127.0.0.1@-@1" : jobInstance.getJobInstanceId());
}
private void removeRunningIfMonitorExecution(final boolean monitorExecution, final List<Integer> shardingItems) {
if (!monitorExecution) {
return;
}
List<Integer> runningShardingItems = new ArrayList<>(shardingItems.size());
for (int each : shardingItems) {
if (isRunning(each)) {
runningShardingItems.add(each);
}
}
shardingItems.removeAll(runningShardingItems);
}
private boolean isRunning(final int shardingItem) {
return jobNodeStorage.isJobNodeExisted(ShardingNode.getRunningNode(shardingItem));
}
private Map<Integer, String> getAssignedShardingItemParameterMap(final List<Integer> shardingItems, final Map<Integer, String> shardingItemParameterMap) {
Map<Integer, String> result = new HashMap<>(shardingItemParameterMap.size(), 1);
for (int each : shardingItems) {
result.put(each, shardingItemParameterMap.get(each));
}
return result;
}
}