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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.distribution.forwarding.lifecycle.api;
import com.google.common.collect.ImmutableMap;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import javax.ws.rs.client.Entity;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
import org.onap.policy.common.endpoints.http.client.HttpClient;
import org.onap.policy.common.endpoints.http.client.HttpClientConfigException;
import org.onap.policy.common.endpoints.http.client.HttpClientFactoryInstance;
import org.onap.policy.common.gson.GsonMessageBodyHandler;
import org.onap.policy.common.parameters.ParameterService;
import org.onap.policy.distribution.forwarding.PolicyForwarder;
import org.onap.policy.distribution.forwarding.PolicyForwardingException;
import org.onap.policy.models.pap.concepts.PdpDeployPolicies;
import org.onap.policy.models.tosca.authorative.concepts.ToscaEntity;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyIdentifierOptVersion;
import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class provides an implementation of {@link PolicyForwarder} interface for forwarding the given policies & policy
* types to the life cycle api's of policy framework.
*
* @author Ram Krishna Verma (ram.krishna.verma@est.tech)
*/
public class LifecycleApiPolicyForwarder implements PolicyForwarder {
private static final String DEPLOY_POLICY_URI = "/policy/pap/v1/pdps/policies";
private static final String CREATE_POLICY_TYPE_URI = "/policy/api/v1/policytypes/";
private static final Logger LOGGER = LoggerFactory.getLogger(LifecycleApiPolicyForwarder.class);
private LifecycleApiForwarderParameters forwarderParameters;
/**
* {@inheritDoc}.
*/
@Override
public void configure(final String parameterGroupName) {
forwarderParameters = ParameterService.get(parameterGroupName);
}
/**
* {@inheritDoc}.
*/
@Override
public void forward(final Collection<ToscaEntity> entities) throws PolicyForwardingException {
final List<ToscaEntity> failedEntities = new ArrayList<>();
for (final ToscaEntity entity : entities) {
forwardSingleEntity(failedEntities, entity);
}
if (!failedEntities.isEmpty()) {
throw new PolicyForwardingException(
"Failed forwarding the following entities: " + Arrays.toString(failedEntities.toArray()));
}
}
private void forwardSingleEntity(final List<ToscaEntity> failedEntities, final ToscaEntity entity) {
Response policyCreated = null;
try {
if (entity instanceof ToscaServiceTemplate) {
final ToscaServiceTemplate toscaServiceTemplate = (ToscaServiceTemplate) entity;
if (null != toscaServiceTemplate.getPolicyTypes() && !toscaServiceTemplate.getPolicyTypes().isEmpty()) {
createPolicyType(toscaServiceTemplate);
}
if (null != toscaServiceTemplate.getToscaTopologyTemplate()
&& null != toscaServiceTemplate.getToscaTopologyTemplate().getPolicies()
&& !toscaServiceTemplate.getToscaTopologyTemplate().getPolicies().isEmpty()
&& !toscaServiceTemplate.getToscaTopologyTemplate().getPolicies().get(0).entrySet().isEmpty()) {
policyCreated = createPolicy(toscaServiceTemplate);
}
if (forwarderParameters.isDeployPolicies() && policyCreated != null) {
deployPolicy(policyCreated.readEntity(ToscaServiceTemplate.class));
}
} else {
throw new PolicyForwardingException("The entity is not of type ToscaServiceTemplate - " + entity);
}
} catch (final Exception exp) {
LOGGER.error(exp.getMessage(), exp);
failedEntities.add(entity);
}
}
private Response createPolicyType(final ToscaServiceTemplate toscaServiceTemplate)
throws PolicyForwardingException {
return invokeHttpClient(Entity.entity(toscaServiceTemplate, MediaType.APPLICATION_JSON), CREATE_POLICY_TYPE_URI,
true);
}
private Response createPolicy(final ToscaServiceTemplate toscaServiceTemplate) throws PolicyForwardingException {
final ToscaPolicy policy = toscaServiceTemplate.getToscaTopologyTemplate().getPolicies().get(0).entrySet()
.iterator().next().getValue();
return invokeHttpClient(Entity.entity(toscaServiceTemplate, MediaType.APPLICATION_JSON),
CREATE_POLICY_TYPE_URI + policy.getType() + "/versions/" + policy.getTypeVersion() + "/policies", true);
}
private Response deployPolicy(final ToscaServiceTemplate toscaServiceTemplate) throws PolicyForwardingException {
final PdpDeployPolicies pdpPolicies = new PdpDeployPolicies();
final List<ToscaPolicyIdentifierOptVersion> policyIdentifierList = new ArrayList<>();
for (final Map<String, ToscaPolicy> policyMap : toscaServiceTemplate.getToscaTopologyTemplate().getPolicies()) {
final String policyId = policyMap.entrySet().iterator().next().getValue().getMetadata().get("policy-id");
final String policyVersion =
policyMap.entrySet().iterator().next().getValue().getMetadata().get("policy-version");
final ToscaPolicyIdentifierOptVersion toscaPolicyIdentifier =
new ToscaPolicyIdentifierOptVersion(policyId, policyVersion);
policyIdentifierList.add(toscaPolicyIdentifier);
}
pdpPolicies.setPolicies(policyIdentifierList);
return invokeHttpClient(Entity.entity(pdpPolicies, MediaType.APPLICATION_JSON), DEPLOY_POLICY_URI, false);
}
private Response invokeHttpClient(final Entity<?> entity, final String path, final boolean wantApi)
throws PolicyForwardingException {
Response response = null;
try {
response = getHttpClient(wantApi).post(path, entity, ImmutableMap.of(HttpHeaders.ACCEPT,
MediaType.APPLICATION_JSON, HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON));
if (response.getStatus() != Status.OK.getStatusCode()) {
LOGGER.error(
"Invocation of path {} failed for entity {}. Response status: {}, Response status info: {}",
path, entity, response.getStatus(), response.getStatusInfo());
throw new PolicyForwardingException("Failed creating the entity - " + entity);
}
} catch (final HttpClientConfigException exception) {
LOGGER.error(
"Invocation of path " + path + " failed for entity " + entity + " due to error opening Http client",
exception);
throw new PolicyForwardingException("Failed creating the entity - " + entity, exception);
}
return response;
}
private HttpClient getHttpClient(final boolean wantApi) throws HttpClientConfigException {
final boolean https = forwarderParameters.isHttps();
final LifecycleApiParameters parameters =
(wantApi ? forwarderParameters.getApiParameters() : forwarderParameters.getPapParameters());
final BusTopicParams params = BusTopicParams.builder().clientName("Policy Distribution").useHttps(https)
.hostname(parameters.getHostName()).port(parameters.getPort()).userName(parameters.getUserName())
.password(parameters.getPassword()).serializationProvider(GsonMessageBodyHandler.class.getName())
.build();
return HttpClientFactoryInstance.getClientFactory().build(params);
}
}
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