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/*-
* ============LICENSE_START=======================================================
* ONAP - SO
* ================================================================================
* 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.openecomp.mso.client.policy;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.ClientResponseFilter;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation.Builder;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.ext.ContextResolver;
import org.apache.log4j.Logger;
import org.openecomp.mso.client.RestProperties;
import org.openecomp.mso.logger.MsoLogger;
import org.springframework.stereotype.Service;
import com.fasterxml.jackson.databind.ObjectMapper;
@Service
public abstract class RestClient {
protected static final String ECOMP_COMPONENT_NAME = "MSO";
private static final int MAX_PAYLOAD_SIZE = 1024 * 1024;
private WebTarget webTarget;
protected final Map<String, String> headerMap;
protected final MsoLogger msoLogger;
protected URL host;
protected Optional<URI> path;
protected Logger logger;
protected String accept;
protected String contentType;
protected RestClient(RestProperties props, Optional<URI> path) {
logger = Logger.getLogger(getClass().getName());
msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.GENERAL);
headerMap = new HashMap<>();
try {
host = props.getEndpoint();
} catch (MalformedURLException e) {
logger.error("url not valid", e);
throw new RuntimeException(e);
}
this.path = path;
initializeClient(getClient());
}
protected RestClient(RestProperties props, Optional<URI> path, String accept, String contentType) {
this(props, path);
this.accept = accept;
this.contentType = contentType;
}
protected RestClient(URL host, String contentType) {
headerMap = new HashMap<>();
logger = Logger.getLogger(getClass().getName());
msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.GENERAL);
this.path = Optional.empty();
this.host = host;
this.contentType = contentType;
initializeClient(getClient());
}
/**
* Override method to return false to disable logging.
*
* @return true - to enable logging, false otherwise
*/
protected boolean enableLogging() {
return true;
}
/**
* Override method to return custom value for max payload size.
*
* @return Default value for MAX_PAYLOAD_SIZE = 1024 * 1024
*/
protected int getMaxPayloadSize()
{
return MAX_PAYLOAD_SIZE;
}
protected Builder getBuilder() {
Builder builder = webTarget.request();
initializeHeaderMap(headerMap);
for (Entry<String, String> entry : headerMap.entrySet()) {
builder.header(entry.getKey(), entry.getValue());
}
return builder;
}
protected abstract void initializeHeaderMap(Map<String, String> headerMap);
protected abstract Optional<ClientResponseFilter> addResponseFilter();
public abstract RestClient addRequestId(String requestId);
protected ContextResolver<ObjectMapper> getMapper() {
return new CommonObjectMapperProvider();
}
protected String getAccept() {
return accept;
}
protected String getContentType() {
return contentType;
}
protected String getMergeContentType() {
return "application/merge-patch+json";
}
protected Client getClient() {
return ClientBuilder.newBuilder().build();
}
protected void initializeClient(Client client) {
if (this.enableLogging()) {
client.register(logger).register(new LoggingFilter(this.getMaxPayloadSize()));
}
client.register(this.getMapper());
Optional<ClientResponseFilter> responseFilter = this.addResponseFilter();
if (responseFilter.isPresent()) {
client.register(responseFilter.get());
}
if (!path.isPresent()) {
webTarget = client.target(host.toString());
} else {
webTarget = client.target(UriBuilder.fromUri(host + path.get().toString()));
}
this.accept = MediaType.APPLICATION_JSON;
this.contentType = MediaType.APPLICATION_JSON;
}
public Response get() {
return this.getBuilder().accept(this.getAccept()).get();
}
public Response post(Object obj) {
return this.getBuilder().accept(this.getAccept()).post(Entity.entity(obj, this.getContentType()));
}
public Response patch(Object obj) {
return this.getBuilder().header("X-HTTP-Method-Override", "PATCH").accept(this.getAccept())
.post(Entity.entity(obj, this.getMergeContentType()));
}
public Response put(Object obj) {
return this.getBuilder().accept(this.getAccept()).put(Entity.entity(obj, this.getContentType()));
}
public Response delete() {
return this.getBuilder().accept(this.getAccept()).delete();
}
public Response delete(Object obj) {
return this.getBuilder().header("X-HTTP-Method-Override", "DELETE").accept(this.getAccept())
.put(Entity.entity(obj, this.getContentType()));
}
public <T> T get(Class<T> resultClass) {
return this.get().readEntity(resultClass);
}
public <T> T get(GenericType<T> resultClass) {
return this.get().readEntity(resultClass);
}
public <T> T post(Object obj, Class<T> resultClass) {
return this.post(obj).readEntity(resultClass);
}
public <T> T patch(Object obj, Class<T> resultClass) {
return this.patch(obj).readEntity(resultClass);
}
public <T> T put(Object obj, Class<T> resultClass) {
return this.put(obj).readEntity(resultClass);
}
public <T> T delete(Class<T> resultClass) {
return this.delete().readEntity(resultClass);
}
public <T> T delete(Object obj, Class<T> resultClass) {
return this.delete(obj).readEntity(resultClass);
}
}
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