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/*-
* ============LICENSE_START=======================================================
* dcae-inventory
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.inventory.clients;
import org.onap.dcae.inventory.InventoryConfiguration;
import org.onap.dcae.inventory.exceptions.DCAEControllerClientException;
import org.onap.dcae.inventory.exceptions.DCAEControllerConnectionException;
import org.onap.dcae.inventory.exceptions.DCAEControllerTimeoutException;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.ws.rs.ProcessingException;
import javax.ws.rs.client.Client;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import static org.glassfish.jersey.client.authentication.HttpAuthenticationFeature.*;
/**
* Created by mhwang on 5/12/16.
*/
public class DCAEControllerClient {
/**
* Used for JSON objects of the form:
* "hostService": {"$ref": "/services/vm-docker-host-2/instances/mtl2"}
*/
public static class Reference {
@JsonProperty("$ref")
private String ref;
public String getRef() {
return ref;
}
public void setRef(String ref) {
this.ref = ref;
}
}
/**
* Used for the JSON objects returned from /services/{service id}/instances/{instance id}
* calls.
*/
@JsonIgnoreProperties(ignoreUnknown = true)
public static class ServiceInstance {
@JsonProperty("status")
private String status;
/**
* Property points to the Docker host this Docker container runs on.
* This service instance is an application to be run as a Docker container if this value is not null.
*/
@JsonProperty("hostService")
@JsonInclude(JsonInclude.Include.NON_ABSENT)
private Reference hostService;
/**
* Property points to the CDAP cluster this CDAP application is deployed on.
* This service instance is a CDAP application if this value is not null.
*/
@JsonProperty("clusterService")
@JsonInclude(JsonInclude.Include.NON_ABSENT)
private Reference clusterService;
/**
* Property points to the location resource that this instance is associated with.
* This property is not null when the service instance is a "pure" VM.
*/
@JsonProperty("location")
@JsonInclude(JsonInclude.Include.NON_ABSENT)
private Reference location;
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public Reference getHostService() {
return hostService;
}
public void setHostService(Reference hostService) {
this.hostService = hostService;
}
public Reference getClusterService() {
return clusterService;
}
public void setClusterService(Reference clusterService) {
this.clusterService = clusterService;
}
public Reference getLocation() {
return location;
}
public void setLocation(Reference location) {
this.location = location;
}
}
private static final Logger LOG = LoggerFactory.getLogger(DCAEControllerClient.class);
private final Client client;
private final InventoryConfiguration.DCAEControllerConnectionConfiguration connectionConfiguration;
public DCAEControllerClient(Client client,
InventoryConfiguration.DCAEControllerConnectionConfiguration connectionConfiguration) {
this.client = client;
this.connectionConfiguration = connectionConfiguration;
}
public URI constructResourceURI(String resourcePath) {
// TODO: Better way to construct this?
// Make sure that the resource path has a "/" because the UriBuilder sucks and doesn't do it for us.
if (resourcePath.charAt(0) != '/') {
resourcePath = (new StringBuilder("/")).append(resourcePath).toString();
}
StringBuilder actualPath = new StringBuilder("/");
actualPath.append(this.connectionConfiguration.getBasePath());
actualPath.append(resourcePath);
return UriBuilder.fromPath(actualPath.toString()).scheme("http").host(this.connectionConfiguration.getHost())
.port(this.connectionConfiguration.getPort()).build();
}
public ServiceInstance getServiceInstance(String componentId) throws DCAEControllerClientException {
URI uri = constructResourceURI(componentId);
Response response = null;
try {
response = client.target(uri).request(MediaType.APPLICATION_JSON_TYPE)
.header("Content-Type", "application/json")
.property(HTTP_AUTHENTICATION_BASIC_USERNAME, connectionConfiguration.getUser())
.property(HTTP_AUTHENTICATION_BASIC_PASSWORD, connectionConfiguration.getPassword()).get();
} catch (ProcessingException e) {
// Apparently the exceptions are wrapped which is not ideal because many different types of errors are embedded
// in single exception. TODO: May want to come back to split up the errors.
// Example:
// javax.ws.rs.ProcessingException: org.apache.http.conn.ConnectTimeoutException: Connect to <dcae controller domain name>:9998
String message = "Connecting with DCAE controller probably timed out";
LOG.error(message, e);
String exceptionMessage = String.format("%s: %s", message, e.getMessage());
throw new DCAEControllerTimeoutException(exceptionMessage);
} catch (Exception e) {
String message = "Unexpected connection issue with DCAE controller";
LOG.error(message, e);
String exceptionMessage = String.format("%s: %s", message, e.getMessage());
throw new DCAEControllerConnectionException(exceptionMessage);
}
if (LOG.isDebugEnabled()) {
LOG.debug(String.format("Received response from DCAE controller: %d", response.getStatus()));
}
if (response.getStatus() == 200) {
ObjectMapper om = new ObjectMapper();
try {
return om.readValue((InputStream) response.getEntity(), ServiceInstance.class);
} catch (IOException e) {
throw new DCAEControllerClientException(e);
}
}
throw new DCAEControllerClientException(String.format("Unexpected error from DCAE controller: %d", response.getStatus()));
}
public String getLocation(ServiceInstance serviceInstance) {
if (serviceInstance.getLocation() != null) {
return serviceInstance.getLocation().getRef();
} else if (serviceInstance.getClusterService() != null) {
// Drill down: Location is on the underlying CDAP cluster service instance
String cdapClusterRef = serviceInstance.getClusterService().getRef();
return getLocation(getServiceInstance(cdapClusterRef));
} else if (serviceInstance.getHostService() != null) {
// Drill down: Location is on the underlying Docker host service instance
String dockerHostRef = serviceInstance.getHostService().getRef();
return getLocation(getServiceInstance(dockerHostRef));
} else {
throw new DCAEControllerClientException("No valid location for service instance");
}
}
}
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