2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2021 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.clamp.controlloop.participant.dcae.main.parameters;
24 import javax.ws.rs.core.Response;
25 import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
26 import org.onap.policy.common.parameters.BeanValidationResult;
27 import org.onap.policy.common.utils.coder.Coder;
28 import org.onap.policy.common.utils.coder.CoderException;
29 import org.onap.policy.common.utils.coder.StandardCoder;
30 import org.slf4j.Logger;
31 import org.slf4j.LoggerFactory;
34 * This class handles reading, parsing and validating of control loop runtime parameters from JSON files.
36 public class ParticipantDcaeParameterHandler {
38 private static final Logger LOGGER = LoggerFactory.getLogger(ParticipantDcaeParameterHandler.class);
40 private static final Coder CODER = new StandardCoder();
43 * Read the parameters from the path of the file.
45 * @param path path of the config file.
46 * @return the parameters read from the configuration file
47 * @throws ControlLoopException on parameter exceptions
49 public ParticipantDcaeParameters toParticipantDcaeParameters(String path) throws ControlLoopException {
50 ParticipantDcaeParameters parameters = null;
51 // Read the parameters
53 // Read the parameters from JSON
54 File file = new File(path);
55 parameters = CODER.decode(file, ParticipantDcaeParameters.class);
56 } catch (final CoderException e) {
57 final String errorMessage =
58 "error reading parameters from \"" + path + "\"\n" + "(" + e.getClass().getSimpleName() + ")";
59 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage, e);
62 // The JSON processing returns null if there is an empty file
63 if (parameters == null) {
64 final String errorMessage = "no parameters found in \"" + path + "\"";
65 LOGGER.error(errorMessage);
66 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage);
69 // validate the parameters
70 final BeanValidationResult validationResult = parameters.validate();
71 if (!validationResult.isValid()) {
72 final String returnMessage =
73 "validation error(s) on parameters from \"" + path + "\"\n" + validationResult.getResult();
75 LOGGER.error(returnMessage);
76 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, returnMessage);