/**
* 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.services;
import java.util.HashMap;
import java.util.Map;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import org.apache.ambari.server.api.resources.ResourceInstance;
import org.apache.ambari.server.controller.spi.Resource;
/**
* Service responsible for hosts resource requests.
*/
@Path("/hosts/")
public class HostService extends BaseService {
/**
* Parent cluster id.
*/
private String m_clusterName;
/**
* Constructor.
*/
public HostService() {
}
/**
* Constructor.
*
* @param clusterName cluster id
*/
public HostService(String clusterName) {
m_clusterName = clusterName;
}
/**
* Handles GET /clusters/{clusterID}/hosts/{hostID} and /hosts/{hostID}
* Get a specific host.
*
* @param headers http headers
* @param ui uri info
* @param hostName host id
* @return host resource representation
*/
@GET
@Path("{hostName}")
@Produces("text/plain")
public Response getHost(String body, @Context HttpHeaders headers, @Context UriInfo ui,
@PathParam("hostName") String hostName) {
return handleRequest(headers, body, ui, Request.Type.GET,
createHostResource(m_clusterName, hostName, ui));
}
/**
* Handles GET /clusters/{clusterID}/hosts and /hosts
* Get all hosts for a cluster.
*
* @param headers http headers
* @param ui uri info
* @return host collection resource representation
*/
@GET
@Produces("text/plain")
public Response getHosts(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
return handleRequest(headers, body, ui, Request.Type.GET,
createHostResource(m_clusterName, null, ui));
}
/**
* Handles POST /clusters/{clusterID}/hosts
* Create hosts by specifying an array of hosts in the http body.
* This is used to create multiple hosts in a single request.
*
* @param body http body
* @param headers http headers
* @param ui uri info
*
* @return status code only, 201 if successful
*/
@POST
@Produces("text/plain")
public Response createHosts(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
return handleRequest(headers, body, ui, Request.Type.POST,
createHostResource(m_clusterName, null, ui));
}
/**
* Handles POST /clusters/{clusterID}/hosts/{hostID}
* Create a specific host.
*
* @param body http body
* @param headers http headers
* @param ui uri info
* @param hostName host id
*
* @return host resource representation
*/
@POST
@Path("{hostName}")
@Produces("text/plain")
public Response createHost(String body, @Context HttpHeaders headers, @Context UriInfo ui,
@PathParam("hostName") String hostName) {
return handleRequest(headers, body, ui, Request.Type.POST,
createHostResource(m_clusterName, hostName, ui));
}
/**
* Handles PUT /clusters/{clusterID}/hosts/{hostID}
* Updates a specific host.
*
* @param body http body
* @param headers http headers
* @param ui uri info
* @param hostName host id
*
* @return information regarding updated host
*/
@PUT
@Path("{hostName}")
@Produces("text/plain")
public Response updateHost(String body, @Context HttpHeaders headers, @Context UriInfo ui,
@PathParam("hostName") String hostName) {
return handleRequest(headers, body, ui, Request.Type.PUT,
createHostResource(m_clusterName, hostName, ui));
}
/**
* Handles PUT /clusters/{clusterID}/hosts
* Updates multiple hosts.
*
* @param body http body
* @param headers http headers
* @param ui uri info
*
* @return information regarding updated host
*/
@PUT
@Produces("text/plain")
public Response updateHosts(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
return handleRequest(headers, body, ui, Request.Type.PUT,
createHostResource(m_clusterName, null, ui));
}
/**
* Handles DELETE /clusters/{clusterID}/hosts/{hostID}
* Deletes a specific host.
*
* @param headers http headers
* @param ui uri info
* @param hostName host id
*
* @return host resource representation
*/
@DELETE
@Path("{hostName}")
@Produces("text/plain")
public Response deleteHost(@Context HttpHeaders headers, @Context UriInfo ui,
@PathParam("hostName") String hostName) {
return handleRequest(headers, null, ui, Request.Type.DELETE,
createHostResource(m_clusterName, hostName, ui));
}
@DELETE
@Produces("text/plain")
public Response deleteHosts(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
return handleRequest(headers, body, ui, Request.Type.DELETE,
createHostResource(m_clusterName, null, ui));
}
/**
* Get the host_components sub-resource.
*
* @param hostName host id
* @return the host_components service
*/
@Path("{hostName}/host_components")
public HostComponentService getHostComponentHandler(@PathParam("hostName") String hostName) {
return new HostComponentService(m_clusterName, hostName);
}
/**
* Get the kerberos_identities sub-resource.
*
* @param hostName host id
* @return the host_components service
*/
@Path("{hostName}/kerberos_identities")
public HostKerberosIdentityService getHostKerberosIdentityHandler(@PathParam("hostName") String hostName) {
return new HostKerberosIdentityService(m_clusterName, hostName);
}
/**
* Get the alerts sub-resource.
*
* @param hostName host id
* @return the alerts service
*/
@Path("{hostName}/alerts")
public AlertService getAlertHandler(@PathParam("hostName") String hostName) {
return new AlertService(m_clusterName, null, hostName);
}
/**
* Gets the alert history service
*
* @param request
* the request
* @param hostName
* the host name
*
* @return the alert history service
*/
@Path("{hostName}/alert_history")
public AlertHistoryService getAlertHistoryService(
@Context javax.ws.rs.core.Request request,
@PathParam("hostName") String hostName) {
return new AlertHistoryService(m_clusterName, null, hostName);
}
/**
* Gets the host stack versions service.
*
* @param request
* the request
* @param hostName
* the host name
*
* @return the host stack versions service
*/
@Path("{hostName}/stack_versions")
public HostStackVersionService getHostStackVersionService(@Context javax.ws.rs.core.Request request,
@PathParam("hostName") String hostName) {
return new HostStackVersionService(hostName, m_clusterName);
}
/**
* Create a service resource instance.
*
*
*
* @param clusterName cluster
* @param hostName host name
* @param ui uri information
*
* @return a host resource instance
*/
ResourceInstance createHostResource(String clusterName, String hostName, UriInfo ui) {
Map<Resource.Type,String> mapIds = new HashMap<>();
mapIds.put(Resource.Type.Host, hostName);
if (clusterName != null) {
mapIds.put(Resource.Type.Cluster, clusterName);
}
return createResource(Resource.Type.Host, mapIds);
}
}