/**
* Copyright 2008 the original author or authors.
*
* 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 net.sf.katta.operation.master;
import java.util.List;
import net.sf.katta.master.MasterContext;
import net.sf.katta.operation.OperationId;
import net.sf.katta.operation.node.OperationResult;
import net.sf.katta.protocol.InteractionProtocol;
import net.sf.katta.protocol.metadata.IndexDeployError;
import net.sf.katta.protocol.metadata.IndexMetaData;
import net.sf.katta.protocol.metadata.IndexDeployError.ErrorType;
public class CheckIndicesOperation extends AbstractIndexOperation {
private static final long serialVersionUID = 1L;
@Override
public List<OperationId> execute(MasterContext context, List<MasterOperation> runningOperations) throws Exception {
InteractionProtocol protocol = context.getProtocol();
List<String> liveNodes = protocol.getLiveNodes();
List<String> indices = protocol.getIndices();
for (String indexName : indices) {
IndexMetaData indexMD = protocol.getIndexMD(indexName);
if (indexMD != null) { // can be removed already
if ((indexMD.hasDeployError() && isRecoverable(indexMD.getDeployError(), liveNodes.size()))
|| canAndShouldRegulateReplication(protocol, indexMD)) {
protocol.addMasterOperation(new BalanceIndexOperation(indexName));
}
}
}
return null;
}
private boolean isRecoverable(IndexDeployError deployError, int nodeCount) {
if (deployError.getErrorType() == ErrorType.NO_NODES_AVAILIBLE && nodeCount > 0) {
return true;
}
return false;
}
@Override
public void nodeOperationsComplete(MasterContext context, List<OperationResult> results) throws Exception {
// nothing to do
}
@Override
public ExecutionInstruction getExecutionInstruction(List<MasterOperation> runningOperations) throws Exception {
for (MasterOperation operation : runningOperations) {
if (operation instanceof CheckIndicesOperation) {
return ExecutionInstruction.ADD_TO_QUEUE_TAIL;
}
}
return ExecutionInstruction.EXECUTE;
}
@Override
public String toString() {
return getClass().getSimpleName() + ":" + Integer.toHexString(hashCode());
}
}