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/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.hadoop.ozone.container.common.states.datanode;
import com.google.common.base.Strings;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdds.HddsUtils;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;
import org.apache.hadoop.ozone.container.common.helpers.ContainerUtils;
import org.apache.hadoop.ozone.container.common.statemachine
.DatanodeStateMachine;
import org.apache.hadoop.ozone.container.common.statemachine
.SCMConnectionManager;
import org.apache.hadoop.ozone.container.common.statemachine.StateContext;
import org.apache.hadoop.ozone.container.common.states.DatanodeState;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Collection;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import static org.apache.hadoop.hdds.HddsUtils.getSCMAddresses;
/**
* Init Datanode State is the task that gets run when we are in Init State.
*/
public class InitDatanodeState implements DatanodeState,
Callable<DatanodeStateMachine.DatanodeStates> {
static final Logger LOG = LoggerFactory.getLogger(InitDatanodeState.class);
private final SCMConnectionManager connectionManager;
private final Configuration conf;
private final StateContext context;
private Future<DatanodeStateMachine.DatanodeStates> result;
/**
* Create InitDatanodeState Task.
*
* @param conf - Conf
* @param connectionManager - Connection Manager
* @param context - Current Context
*/
public InitDatanodeState(Configuration conf,
SCMConnectionManager connectionManager,
StateContext context) {
this.conf = conf;
this.connectionManager = connectionManager;
this.context = context;
}
/**
* Computes a result, or throws an exception if unable to do so.
*
* @return computed result
* @throws Exception if unable to compute a result
*/
@Override
public DatanodeStateMachine.DatanodeStates call() throws Exception {
Collection<InetSocketAddress> addresses = null;
try {
addresses = getSCMAddresses(conf);
} catch (IllegalArgumentException e) {
if(!Strings.isNullOrEmpty(e.getMessage())) {
LOG.error("Failed to get SCM addresses: " + e.getMessage());
}
return DatanodeStateMachine.DatanodeStates.SHUTDOWN;
}
if (addresses == null || addresses.isEmpty()) {
LOG.error("Null or empty SCM address list found.");
return DatanodeStateMachine.DatanodeStates.SHUTDOWN;
} else {
for (InetSocketAddress addr : addresses) {
connectionManager.addSCMServer(addr);
}
}
// If datanode ID is set, persist it to the ID file.
persistContainerDatanodeDetails();
return this.context.getState().getNextState();
}
/**
* Persist DatanodeDetails to datanode.id file.
*/
private void persistContainerDatanodeDetails() throws IOException {
String dataNodeIDPath = HddsUtils.getDatanodeIdFilePath(conf);
File idPath = new File(dataNodeIDPath);
DatanodeDetails datanodeDetails = this.context.getParent()
.getDatanodeDetails();
if (datanodeDetails != null && !idPath.exists()) {
ContainerUtils.writeDatanodeDetailsTo(datanodeDetails, idPath);
LOG.info("DatanodeDetails is persisted to {}", dataNodeIDPath);
}
}
/**
* Called before entering this state.
*/
@Override
public void onEnter() {
LOG.trace("Entering init container state");
}
/**
* Called After exiting this state.
*/
@Override
public void onExit() {
LOG.trace("Exiting init container state");
}
/**
* Executes one or more tasks that is needed by this state.
*
* @param executor - ExecutorService
*/
@Override
public void execute(ExecutorService executor) {
result = executor.submit(this);
}
/**
* Wait for execute to finish.
*
* @param time - Time
* @param timeUnit - Unit of time.
*/
@Override
public DatanodeStateMachine.DatanodeStates await(long time,
TimeUnit timeUnit) throws InterruptedException,
ExecutionException, TimeoutException {
return result.get(time, timeUnit);
}
}
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