| /* |
| * 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.camel.component.aws.ddb; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| |
| import com.amazonaws.services.dynamodbv2.AmazonDynamoDB; |
| import com.amazonaws.services.dynamodbv2.model.AttributeValue; |
| import com.amazonaws.services.dynamodbv2.model.ExpectedAttributeValue; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Message; |
| |
| public abstract class AbstractDdbCommand { |
| protected DdbConfiguration configuration; |
| protected Exchange exchange; |
| protected AmazonDynamoDB ddbClient; |
| |
| public AbstractDdbCommand(AmazonDynamoDB ddbClient, |
| DdbConfiguration configuration, Exchange exchange) { |
| |
| this.ddbClient = ddbClient; |
| this.configuration = configuration; |
| this.exchange = exchange; |
| } |
| |
| public abstract void execute(); |
| |
| protected Message getMessageForResponse(Exchange exchange) { |
| if (exchange.getPattern().isOutCapable()) { |
| Message out = exchange.getOut(); |
| out.copyFrom(exchange.getIn()); |
| return out; |
| } |
| return exchange.getIn(); |
| } |
| |
| protected String determineTableName() { |
| String tableName = exchange.getIn().getHeader(DdbConstants.TABLE_NAME, String.class); |
| return tableName != null ? tableName : configuration.getTableName(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected Map<String, ExpectedAttributeValue> determineUpdateCondition() { |
| return exchange.getIn().getHeader(DdbConstants.UPDATE_CONDITION, Map.class); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected Map<String, AttributeValue> determineItem() { |
| return exchange.getIn().getHeader(DdbConstants.ITEM, Map.class); |
| } |
| |
| protected String determineReturnValues() { |
| return exchange.getIn().getHeader(DdbConstants.RETURN_VALUES, String.class); |
| } |
| |
| protected void addAttributesToResult(Map<String, AttributeValue> attributes) { |
| Message msg = getMessageForResponse(exchange); |
| msg.setHeader(DdbConstants.ATTRIBUTES, attributes); |
| } |
| |
| protected void addToResults(Map<String, Object> map) { |
| Message msg = getMessageForResponse(exchange); |
| for (Map.Entry<String, Object> en : map.entrySet()) { |
| msg.setHeader(en.getKey(), en.getValue()); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected Map<String, AttributeValue> determineKey() { |
| return exchange.getIn().getHeader(DdbConstants.KEY, Map.class); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected Collection<String> determineAttributeNames() { |
| return exchange.getIn().getHeader(DdbConstants.ATTRIBUTE_NAMES, Collection.class); |
| } |
| |
| protected Boolean determineConsistentRead() { |
| return exchange.getIn().getHeader(DdbConstants.CONSISTENT_READ, configuration.isConsistentRead(), Boolean.class); |
| } |
| } |