/**
* 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.processor;
import java.util.List;
import org.apache.camel.Channel;
import org.apache.camel.Navigate;
import org.apache.camel.Processor;
import org.apache.camel.Route;
import org.apache.camel.model.LoadBalanceDefinition;
import org.apache.camel.model.ProcessorDefinition;
import org.apache.camel.model.RouteDefinition;
import org.apache.camel.model.SendDefinition;
import org.apache.camel.processor.loadbalancer.LoadBalancer;
import org.apache.camel.processor.loadbalancer.RandomLoadBalancer;
/**
* A crude unit test to navigate the route and build a Java DSL from the route definition
*/
public class RandomLoadBalanceJavaDSLBuilderTest extends RandomLoadBalanceTest {
public void testNavigateRouteAsJavaDSLWithNavigate() throws Exception {
// this one navigate using the runtime route using the Navigate<Processor>
StringBuilder sb = new StringBuilder();
Route route = context.getRoutes().get(0);
// the start of the route
sb.append("from(\"" + route.getEndpoint().getEndpointUri() + "\")");
// navigate the route and add Java DSL to the sb
Navigate<Processor> nav = route.navigate();
navigateRoute(nav, sb);
// output the Java DSL
assertEquals("from(\"direct://start\").loadBalance().random().to(\"mock://x\").to(\"mock://y\").to(\"mock://z\")", sb.toString());
}
public void testNavigateRouteAsJavaDSL() throws Exception {
// this one navigate using the route definiton
StringBuilder sb = new StringBuilder();
RouteDefinition route = context.getRouteDefinitions().get(0);
// the start of the route
sb.append("from(\"" + route.getInputs().get(0).getEndpoint().getEndpointUri() + "\")");
// navigate the route and add Java DSL to the sb
navigateDefinition(route, sb);
// output the Java DSL
assertEquals("from(\"direct://start\").loadBalance().random().to(\"mock://x\").to(\"mock://y\").to(\"mock://z\")", sb.toString());
}
private void navigateRoute(Navigate<Processor> nav, StringBuilder sb) {
if (!nav.hasNext()) {
return;
}
for (Processor child : nav.next()) {
if (child instanceof Channel) {
Channel channel = (Channel) child;
ProcessorDefinition def = channel.getProcessorDefinition();
navigateDefinition(def, sb);
}
}
}
private void navigateDefinition(ProcessorDefinition def, StringBuilder sb) {
if (def instanceof LoadBalanceDefinition) {
sb.append(".loadBalance()");
LoadBalanceDefinition lbd = (LoadBalanceDefinition) def;
LoadBalancer balancer = lbd.getLoadBalancerType().getLoadBalancer(null);
if (balancer instanceof RandomLoadBalancer) {
sb.append(".random()");
}
}
if (def instanceof SendDefinition) {
SendDefinition send = (SendDefinition) def;
sb.append(".to(\"" + send.getEndpoint().getEndpointUri() + "\")");
}
List<ProcessorDefinition> children = def.getOutputs();
if (children == null || children.isEmpty()) {
return;
}
for (ProcessorDefinition child : children) {
navigateDefinition(child, sb);
}
}
}