/**
* 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.ambari.server.api.resources;
import org.apache.ambari.server.api.services.Request;
import org.apache.ambari.server.controller.utilities.ClusterControllerHelper;
import org.apache.ambari.server.controller.spi.Resource;
import org.apache.ambari.server.controller.spi.Schema;
import org.apache.ambari.server.api.util.TreeNode;
import org.apache.ambari.server.controller.utilities.PropertyHelper;
import java.util.*;
/**
* Host_Component resource definition.
*/
public class HostComponentResourceDefinition extends BaseResourceDefinition {
/**
* Constructor.
*/
public HostComponentResourceDefinition() {
super(Resource.Type.HostComponent);
}
@Override
public String getPluralName() {
return "host_components";
}
@Override
public String getSingularName() {
return "host_component";
}
@Override
public Set<SubResourceDefinition> getSubResourceDefinitions() {
Set<SubResourceDefinition> setSubResources = new HashSet<SubResourceDefinition>();
setSubResources.add(new SubResourceDefinition(Resource.Type.Component,
Collections.singleton(Resource.Type.Service), false));
setSubResources.add(new SubResourceDefinition(Resource.Type.HostComponentProcess));
return setSubResources;
}
@Override
public List<PostProcessor> getPostProcessors() {
List<PostProcessor> listProcessors = new ArrayList<PostProcessor>();
listProcessors.add(new HostComponentHrefProcessor());
listProcessors.add(new HostComponentHostProcessor());
return listProcessors;
}
/**
* Host_Component resource processor which is responsible for generating href's for host components.
* This is called by the ResultPostProcessor during post processing of a result.
*/
private class HostComponentHrefProcessor extends BaseHrefPostProcessor {
@Override
public void process(Request request, TreeNode<Resource> resultNode, String href) {
if (! href.contains("/hosts/")) {
Resource r = resultNode.getObject();
Schema schema = ClusterControllerHelper.getClusterController().getSchema(r.getType());
Object host = r.getPropertyValue(schema.getKeyPropertyId(Resource.Type.Host));
Object hostComponent = r.getPropertyValue(schema.getKeyPropertyId(r.getType()));
int idx = href.indexOf("clusters/") + "clusters/".length();
idx = href.indexOf("/", idx) + 1;
href = href.substring(0, idx) +
"hosts/" + host + "/host_components/" + hostComponent;
resultNode.setProperty("href", href);
} else {
super.process(request, resultNode, href);
}
}
}
/**
* Host_Component resource processor which is responsible for generating a host section for host components.
* This is called by the ResultPostProcessor during post processing of a result.
*/
private class HostComponentHostProcessor implements PostProcessor {
@Override
public void process(Request request, TreeNode<Resource> resultNode, String href) {
//todo: look at partial request fields to ensure that hosts should be returned
if (request.getResource().getResourceDefinition().getType() == getType()) {
// only add host if query host_resource was directly queried
String nodeHref = resultNode.getProperty("href");
resultNode.getObject().setProperty(PropertyHelper.getPropertyId("host", "href"),
nodeHref.substring(0, nodeHref.indexOf("/host_components/")));
}
}
}
}