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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2018 Ericsson. All rights reserved.
* Copyright (C) 2019 Intel Corp. All rights reserved.
* Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.xacml.pdp;
import java.util.Collection;
import java.util.Collections;
import javax.ws.rs.client.Entity;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.onap.policy.api.PolicyParameters;
import org.onap.policy.api.PushPolicyParameters;
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.HttpClientFactory;
import org.onap.policy.common.endpoints.http.client.HttpClientFactoryInstance;
import org.onap.policy.common.parameters.ParameterService;
import org.onap.policy.distribution.forwarding.PolicyForwarder;
import org.onap.policy.distribution.forwarding.xacml.pdp.adapters.XacmlPdpOptimizationPolicyAdapter;
import org.onap.policy.models.tosca.authorative.concepts.ToscaEntity;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
/**
* Forwards policies to the XACML PDP.
*/
public class XacmlPdpPolicyForwarder implements PolicyForwarder {
private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpPolicyForwarder.class);
private static final String BASE_PATH = "pdp/api/";
private XacmlPdpPolicyForwarderParameterGroup configurationParameters = null;
@Override
public void forward(final Collection<ToscaEntity> policies) {
for (final ToscaEntity policy : policies) {
forward(policy);
}
}
private void forward(final ToscaEntity policy) {
final XacmlPdpPolicyAdapter<?> policyAdapter = getXacmlPdpPolicyAdapter(policy);
if (policyAdapter == null) {
LOGGER.error("Cannot forward policy {}. Unsupported policy type {}", policy,
policy.getClass().getSimpleName());
return;
}
final boolean policyCreated = createPolicy(policyAdapter);
if (policyCreated) {
pushPolicy(policyAdapter);
}
}
private XacmlPdpPolicyAdapter<?> getXacmlPdpPolicyAdapter(final ToscaEntity policy) {
if (policy instanceof ToscaPolicy) {
return new XacmlPdpOptimizationPolicyAdapter((ToscaPolicy) policy);
}
return null;
}
private boolean createPolicy(final XacmlPdpPolicyAdapter<?> policyAdapter) {
final PolicyParameters policyParameters = policyAdapter.getAsPolicyParameters();
final Entity<PolicyParameters> entity = Entity.entity(policyParameters, MediaType.APPLICATION_JSON);
return invokeHttpClient(entity, "createPolicy", policyAdapter.getPolicy().getName());
}
private boolean pushPolicy(final XacmlPdpPolicyAdapter<?> policyAdapter) {
final PushPolicyParameters pushPolicyParameters =
policyAdapter.getAsPushPolicyParameters(configurationParameters.getPdpGroup());
final Entity<PushPolicyParameters> entity = Entity.entity(pushPolicyParameters, MediaType.APPLICATION_JSON);
return invokeHttpClient(entity, "pushPolicy", policyAdapter.getPolicy().getName());
}
private boolean invokeHttpClient(final Entity<?> entity, final String method, final String policyName) {
try {
final Response response = getHttpClient().put(method, entity,
Collections.singletonMap("ClientAuth", configurationParameters.getClientAuth()));
if (response.getStatus() != HttpStatus.OK.value()) {
LOGGER.error(
"Invocation of method {} failed for policy {}. Response status: {}, Response status info: {}",
method, policyName, response.getStatus(), response.getStatusInfo());
return false;
}
} catch (final HttpClientConfigException exception) {
LOGGER.error("Invocation of method " + method + " failed for policy " + policyName
+ " due to error opening Http client", exception);
return false;
}
return true;
}
private HttpClient getHttpClient() throws HttpClientConfigException {
final boolean useHttps = configurationParameters.isUseHttps();
final String hostname = configurationParameters.getHostname();
final int port = configurationParameters.getPort();
final String userName = configurationParameters.getUserName();
final String password = configurationParameters.getPassword();
final boolean managed = configurationParameters.isManaged();
final BusTopicParams params =
BusTopicParams.builder().clientName("SDC Dist").useHttps(useHttps).hostname(hostname).port(port)
.userName(userName).password(password).basePath(BASE_PATH).managed(managed).build();
return getHttpClientFactory().build(params);
}
@Override
public void configure(final String parameterGroupName) {
configurationParameters = ParameterService.get(parameterGroupName);
}
// these may be overridden by junit tests
protected HttpClientFactory getHttpClientFactory() {
return HttpClientFactoryInstance.getClientFactory();
}
}
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