/*
* 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.provisionr.amazon.activities;
import static com.google.common.base.Preconditions.checkNotNull;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.services.ec2.AmazonEC2;
import com.amazonaws.services.ec2.model.DescribeInstancesRequest;
import com.amazonaws.services.ec2.model.DescribeInstancesResult;
import com.amazonaws.services.ec2.model.Instance;
import org.apache.provisionr.amazon.ProcessVariables;
import org.apache.provisionr.amazon.core.ProviderClientCache;
import org.apache.provisionr.api.pool.Pool;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.base.Throwables;
import com.google.common.collect.Iterables;
import java.util.List;
import org.activiti.engine.delegate.DelegateExecution;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class AllInstancesMatchPredicate extends AmazonActivity {
private static final Logger LOG = LoggerFactory.getLogger(AllInstancesMatchPredicate.class);
private final String resultVariable;
private final Predicate<Instance> predicate;
protected AllInstancesMatchPredicate(ProviderClientCache cache,
String resultVariable, Predicate<Instance> predicate) {
super(cache);
this.resultVariable = checkNotNull(resultVariable, "resultVariable is null");
this.predicate = checkNotNull(predicate, "predicate is null");
}
@Override
public void execute(AmazonEC2 client, Pool pool, DelegateExecution execution) throws Exception {
@SuppressWarnings("unchecked")
Optional<List<String>> instanceIds =
Optional.fromNullable((List<String>) execution.getVariable(ProcessVariables.INSTANCE_IDS));
if (!instanceIds.isPresent()) {
LOG.warn("<< Process variable '{}' not found", ProcessVariables.INSTANCE_IDS);
return;
} else if (instanceIds.get().size() == 0) {
LOG.info(">> No instances are currently registered in the process.");
return;
}
try {
DescribeInstancesResult result = client.describeInstances(new DescribeInstancesRequest()
.withInstanceIds(instanceIds.get()));
List<Instance> instances = collectInstancesFromReservations(result.getReservations());
if (Iterables.all(instances, predicate)) {
LOG.info(">> All {} instances match predicate {} ", instanceIds, predicate);
execution.setVariable(resultVariable, true);
} else {
LOG.info("<< Not all instances {} match predicate {}", instanceIds, predicate);
execution.setVariable(resultVariable, false);
}
} catch (AmazonServiceException exception) {
if (exception.getErrorCode().equalsIgnoreCase("InvalidInstanceID.NotFound")) {
LOG.warn("<< Got error InvalidInstanceID.NotFound. Assuming predicate {} is false", predicate);
execution.setVariable(resultVariable, false);
} else {
throw Throwables.propagate(exception);
}
}
}
}