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.kubernetes.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;
32 * This class handles reading, parsing and validating of control loop participant parameters from JSON files.
34 public class ParticipantK8sParameterHandler {
35 private static final Coder CODER = new StandardCoder();
38 * Read the parameters from the path of the file.
40 * @param path path of the config file.
41 * @return the parameters read from the configuration file
42 * @throws ControlLoopException on parameter exceptions
44 public ParticipantK8sParameters toParticipantK8sParameters(String path) throws ControlLoopException {
45 ParticipantK8sParameters parameters = null;
46 // Read the parameters
48 // Read the parameters from JSON
49 var file = new File(path);
50 parameters = CODER.decode(file, ParticipantK8sParameters.class);
51 } catch (final CoderException e) {
52 final String errorMessage =
53 "error reading parameters from \"" + path + "\"\n" + "(" + e.getClass().getSimpleName() + ")";
54 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage, e);
57 // The JSON processing returns null if there is an empty file
58 if (parameters == null) {
59 final String errorMessage = "no parameters found in \"" + path + "\"";
60 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage);
63 // validate the parameters
64 final BeanValidationResult validationResult = parameters.validate();
65 if (!validationResult.isValid()) {
66 String returnMessage =
67 "validation error(s) on parameters from \"" + path + "\"\n" + validationResult.getResult();
68 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, returnMessage);