001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.component.aws.sdb; 018 019 import com.amazonaws.services.simpledb.AmazonSimpleDB; 020 import com.amazonaws.services.simpledb.model.SelectRequest; 021 import com.amazonaws.services.simpledb.model.SelectResult; 022 023 import org.apache.camel.Exchange; 024 import org.apache.camel.Message; 025 026 public class SelectCommand extends AbstractSdbCommand { 027 028 public SelectCommand(AmazonSimpleDB sdbClient, SdbConfiguration configuration, Exchange exchange) { 029 super(sdbClient, configuration, exchange); 030 } 031 032 public void execute() { 033 SelectRequest request = new SelectRequest() 034 .withSelectExpression(determineSelectExpression()) 035 .withConsistentRead(determineConsistentRead()) 036 .withNextToken(determineNextToken()); 037 log.trace("Sending request [{}] for exchange [{}]...", request, exchange); 038 039 SelectResult result = this.sdbClient.select(request); 040 041 log.trace("Received result [{}]", result); 042 043 Message msg = getMessageForResponse(exchange); 044 msg.setHeader(SdbConstants.ITEMS, result.getItems()); 045 msg.setHeader(SdbConstants.NEXT_TOKEN, result.getNextToken()); 046 } 047 048 protected String determineSelectExpression() { 049 return exchange.getIn().getHeader(SdbConstants.SELECT_EXPRESSION, String.class); 050 } 051 }