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/*-
* ============LICENSE_START=======================================================
* ONAP : CCSDK.apps
* ================================================================================
* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Modifications Copyright (C) 2018 IBM.
* ================================================================================
* 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.ccsdk.apps.ms.neng.core.service.rs;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Logger;
import javax.validation.Valid;
import javax.ws.rs.core.Response;
import org.onap.ccsdk.apps.ms.neng.core.exceptions.NengException;
import org.onap.ccsdk.apps.ms.neng.core.resource.model.HelloWorld;
import org.onap.ccsdk.apps.ms.neng.core.resource.model.NameGenRequest;
import org.onap.ccsdk.apps.ms.neng.core.resource.model.NameGenResponse;
import org.onap.ccsdk.apps.ms.neng.core.service.SpringService;
import org.onap.ccsdk.apps.ms.neng.persistence.entity.PolicyDetails;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.transaction.CannotCreateTransactionException;
import org.springframework.web.bind.annotation.RequestBody;
/**
* Implementation of the REST-style interface/API to this micro-service.
*/
@Component
public class RestServiceImpl implements RestService {
private static final Logger log = Logger.getLogger(RestServiceImpl.class.getName());
private static final String INTERNAL_ERROR_MSG = "Internal error occurred while processing the request: ";
private static final String JDBC_CONNECTION_ERROR_MSG = "Error during JDBC transaction creation: ";
private static final String ERROR="error";
private static final String ERROR_500="err-0500";
private static final int MAX_RETRY = 5;
private int retry = 0;
@Autowired SpringService service;
/**
* Heart-beat/ping API.
*/
@Override
public Response getQuickHello(String name) {
log.info(name);
HelloWorld hw = service.getQuickHello(name);
return Response.ok().entity(hw).build();
}
/**
* Name generation API.
*/
@Override
public Response generateNetworkElementName(@RequestBody @Valid NameGenRequest request) {
log.info("Received request: " + request.toString());
try {
NameGenResponse resp = service.generateOrUpdateName(request);
return buildResponse(resp);
} catch (NengException e) {
log.warning(e.getMessage());
return handleException("NELGEN-0003", e.getMessage());
} catch (CannotCreateTransactionException e) {
log.warning(e.getMessage());
return handleJDBCConnectionException(request, e);
} catch (Exception e) {
log.warning(e.getMessage());
return handleException(ERROR_500, INTERNAL_ERROR_MSG);
}
}
/**
* Name removal API.
*/
@Override
public Response releaseNetworkElementName(NameGenRequest request) {
NameGenResponse resp;
Map<String, Object> response = new HashMap<>();
try {
resp = service.releaseNetworkElementName(request);
return buildResponse(resp);
} catch (NengException e) {
log.warning(e.getMessage());
response.put(ERROR, buildErrorResponse("NELGEN-0002", e.getMessage()));
return buildErrorResponse(response);
} catch (Exception e) {
log.warning(e.getMessage());
response.put(ERROR, buildErrorResponse(ERROR_500, INTERNAL_ERROR_MSG));
return buildErrorResponse(response);
}
}
/**
* API to return naming policy cached in this micro-service.
*/
@Override
public Response getPolicyResponse(String policyName) throws Exception {
log.info("get-policy: " + policyName);
PolicyDetails policyDetails = service.getPolicyDetails(policyName);
return Response.ok().entity(policyDetails.getPolicyResponse()).build();
}
/**
* API to add a naming policy to the database cache in this micro-service.
*/
@Override
public Response addPolicyToDb(Object request) throws Exception {
Map<String, Object> response = new HashMap<>();
try {
service.addPolicy(request);
response.put("status", "Policy added successfully");
return buildResponse(response);
} catch (Exception e) {
log.warning(e.getMessage());
response.put(ERROR, buildErrorResponse(ERROR_500, e.getMessage()));
return buildErrorResponse(response);
}
}
private Response handleException(String statusCode, String statusMessage) {
Map<String, Object> response = new HashMap<>();
response.put(ERROR, buildErrorResponse(statusCode, statusMessage));
return buildErrorResponse(response);
}
private Response handleJDBCConnectionException(NameGenRequest request, CannotCreateTransactionException e) {
retry += 1;
if (retry <= MAX_RETRY) {
log.info("Try to generate network element name again! Attempt: " + retry);
Response response = generateNetworkElementName(request);
if (response.getStatus() != 200) {
retry = 0;
}
return response;
} else {
retry = 0;
return handleException(ERROR_500, JDBC_CONNECTION_ERROR_MSG + e.getMessage());
}
}
private Response buildResponse(Object response) {
return Response.ok().entity(response).build();
}
private Response buildErrorResponse(Map<String, Object> response) {
return Response.status(500).entity(response).build();
}
private Map<String,Object> buildErrorResponse(String errorCode, String message) {
Map<String,Object> error = new HashMap<>();
error.put("errorId", errorCode);
error.put("message", message);
return error;
}
}
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