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.runtime.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.ValidationResult;
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 runtime parameters from JSON files.
34 public class ClRuntimeParameterHandler {
36 private static final Coder CODER = new StandardCoder();
39 * Read the parameters from the parameter file.
41 * @param path the path passed to control loop runtime
42 * @return the parameters read from the configuration file
43 * @throws ControlLoopException on parameter exceptions
45 public ClRuntimeParameterGroup getParameters(final String path) throws ControlLoopException {
46 ClRuntimeParameterGroup clRuntimeParameterGroup = null;
48 // Read the parameters
50 // Read the parameters from JSON
51 File file = new File(path);
52 clRuntimeParameterGroup = CODER.decode(file, ClRuntimeParameterGroup.class);
53 } catch (final CoderException e) {
54 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE,
55 "error reading parameters from \"" + path + "\"\n" + "(" + e.getClass().getSimpleName() + ")", e);
58 // The JSON processing returns null if there is an empty file
59 if (clRuntimeParameterGroup == null) {
60 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, "no parameters found in \"" + path + "\"");
63 // validate the parameters
64 final ValidationResult validationResult = clRuntimeParameterGroup.validate();
65 if (!validationResult.isValid()) {
66 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE,
67 "validation error(s) on parameters from \"" + path + "\"\n" + validationResult.getResult());
70 return clRuntimeParameterGroup;