2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 * SPDX-License-Identifier: Apache-2.0
20 * ============LICENSE_END=========================================================
23 package org.onap.policy.xacml.pdp.application.guard;
25 import com.att.research.xacml.api.Request;
26 import com.att.research.xacml.api.Response;
27 import com.att.research.xacml.util.XACMLPolicyScanner;
29 import java.io.ByteArrayInputStream;
31 import java.io.FileInputStream;
32 import java.io.IOException;
33 import java.io.InputStream;
34 import java.nio.charset.StandardCharsets;
35 import java.nio.file.Files;
36 import java.nio.file.Paths;
37 import java.util.List;
39 import java.util.UUID;
40 import java.util.stream.Collectors;
41 import java.util.stream.Stream;
42 import org.apache.commons.io.IOUtils;
43 import org.onap.policy.common.utils.coder.CoderException;
44 import org.onap.policy.common.utils.coder.StandardYamlCoder;
45 import org.onap.policy.models.decisions.concepts.DecisionRequest;
46 import org.onap.policy.models.decisions.concepts.DecisionResponse;
47 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
48 import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
49 import org.onap.policy.pdp.xacml.application.common.ToscaPolicyTranslator;
50 import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
51 import org.slf4j.Logger;
52 import org.slf4j.LoggerFactory;
54 public class CoordinationGuardTranslator implements ToscaPolicyTranslator {
56 private static final Logger LOGGER = LoggerFactory.getLogger(CoordinationGuardTranslator.class);
58 public CoordinationGuardTranslator() {
63 public Object convertPolicy(ToscaPolicy toscaPolicy) throws ToscaPolicyConversionException {
64 LOGGER.debug("Using CoordinationGuardTranslator.convertPolicy");
66 // Policy name should be at the root
68 String type = toscaPolicy.getType();
69 String coordinationFunctionPath = "src/main/resources/coordination/function";
70 Map<String, Object> policyProps = toscaPolicy.getProperties();
71 LOGGER.debug("path = {}", coordinationFunctionPath);
72 LOGGER.debug("props = {}", policyProps);
73 @SuppressWarnings("unchecked")
74 List<String> controlLoop = (List<String>) policyProps.get("controlLoop");
75 CoordinationDirective cd = new CoordinationDirective();
76 cd.setCoordinationFunction(type);
77 cd.setControlLoop(controlLoop);
78 LOGGER.debug("CoordinationDirective = {}", cd);
80 // Generate the xacml policy as a string
82 String xacmlStr = generateXacmlFromCoordinationDirective(cd, coordinationFunctionPath);
83 LOGGER.debug("xacmlStr\n{}", xacmlStr);
85 // Scan the string and convert to PoilcyType
87 try (InputStream is = new ByteArrayInputStream(xacmlStr.getBytes(StandardCharsets.UTF_8))) {
88 return XACMLPolicyScanner.readPolicy(is);
89 } catch (IOException e) {
90 throw new ToscaPolicyConversionException("Failed to read policy", e);
95 * This function is not used for CLC instead
96 * the one in LegacyGuardTranslator is used.
99 public Request convertRequest(DecisionRequest request) throws ToscaPolicyConversionException {
100 throw new ToscaPolicyConversionException("this convertRequest shouldn't be used");
104 * This function is not used for CLC instead
105 * the one in LegacyGuardTranslator is used.
108 public DecisionResponse convertResponse(Response xacmlResponse) {
109 LOGGER.info("this convertResponse shouldn't be used");
114 * Load YAML coordination directive.
116 * @param directiveFilename yaml directive file to load
117 * @return the CoordinationDirective
119 public static CoordinationDirective loadCoordinationDirectiveFromFile(
120 String directiveFilename) {
121 try (InputStream is = new FileInputStream(new File(directiveFilename))) {
122 String contents = IOUtils.toString(is, StandardCharsets.UTF_8);
124 // Read the yaml into our Java Object
126 CoordinationDirective obj =
127 new StandardYamlCoder().decode(contents, CoordinationDirective.class);
128 LOGGER.debug(contents);
130 } catch (IOException | CoderException e) {
131 LOGGER.error("Error while loading YAML coordination directive", e);
137 * Generate Xacml rule implementing specified CoordinationDirective.
139 * @param cd the CoordinationDirective
140 * @param protoDir the directory containing Xacml implementation prototypes
141 * @return the generated Xacml policy
143 public static String generateXacmlFromCoordinationDirective(CoordinationDirective cd,
144 String protoDir) throws ToscaPolicyConversionException {
146 * Determine file names
148 String xacmlProtoFilename =
149 protoDir + File.separator + cd.getCoordinationFunction() + ".xml";
150 LOGGER.debug("xacmlProtoFilename={}", xacmlProtoFilename);
152 * Values to be used for placeholders
154 final String uniqueId = UUID.randomUUID().toString();
155 final String cLOne = cd.getControlLoop(0);
156 final String cLTwo = cd.getControlLoop(1);
158 * Replace function placeholders with appropriate values
160 try (Stream<String> stream = Files.lines(Paths.get(xacmlProtoFilename))) {
161 return stream.map(s -> s.replace("UNIQUE_ID", uniqueId))
162 .map(s -> s.replace("CONTROL_LOOP_ONE", cLOne))
163 .map(s -> s.replace("CONTROL_LOOP_TWO", cLTwo))
164 .collect(Collectors.joining(XacmlPolicyUtils.LINE_SEPARATOR));
165 } catch (IOException e) {
166 throw new ToscaPolicyConversionException(
167 "Error while generating XACML policy for coordination directive", e);