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 */ 017package org.apache.camel.support; 018 019import org.apache.camel.Exchange; 020import org.apache.camel.impl.cloud.ServiceCallConstants; 021import org.apache.camel.util.ExchangeHelper; 022import org.apache.camel.util.ObjectHelper; 023 024public abstract class ServiceCallExpressionSupport extends ExpressionAdapter { 025 private String hostHeader; 026 private String portHeader; 027 028 public ServiceCallExpressionSupport() { 029 this(ServiceCallConstants.SERVICE_HOST, ServiceCallConstants.SERVICE_PORT); 030 } 031 032 public ServiceCallExpressionSupport(String hostHeader, String portHeader) { 033 this.hostHeader = hostHeader; 034 this.portHeader = portHeader; 035 } 036 037 public String getHostHeader() { 038 return hostHeader; 039 } 040 041 public void setHostHeader(String hostHeader) { 042 this.hostHeader = hostHeader; 043 } 044 045 public String getPortHeader() { 046 return portHeader; 047 } 048 049 public void setPortHeader(String portHeader) { 050 this.portHeader = portHeader; 051 } 052 053 @Override 054 public Object evaluate(Exchange exchange) { 055 try { 056 return buildCamelEndpointUri( 057 ExchangeHelper.getMandatoryHeader(exchange, ServiceCallConstants.SERVICE_NAME, String.class), 058 ExchangeHelper.getMandatoryHeader(exchange, hostHeader, String.class), 059 exchange.getIn().getHeader(portHeader, Integer.class), 060 exchange.getIn().getHeader(ServiceCallConstants.SERVICE_CALL_URI, String.class), 061 exchange.getIn().getHeader(ServiceCallConstants.SERVICE_CALL_CONTEXT_PATH, String.class), 062 exchange.getIn().getHeader(ServiceCallConstants.SERVICE_CALL_SCHEME, String.class)); 063 } catch (Exception e) { 064 throw ObjectHelper.wrapRuntimeCamelException(e); 065 } 066 } 067 068 protected abstract String buildCamelEndpointUri(String name, String host, Integer port, String uri, String contextPath, String scheme); 069}