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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2018 Ericsson. All rights reserved.
* Copyright (C) 2019 Nordix Foundation.
* Modifications Copyright (C) 2020 AT&T Inc.
* ================================================================================
* 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.reception.handling;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;
import org.onap.policy.common.parameters.ParameterService;
import org.onap.policy.distribution.forwarding.PolicyForwarder;
import org.onap.policy.distribution.forwarding.parameters.PolicyForwarderParameters;
import org.onap.policy.distribution.model.PolicyInput;
import org.onap.policy.distribution.reception.decoding.PluginInitializationException;
import org.onap.policy.distribution.reception.decoding.PolicyDecoder;
import org.onap.policy.distribution.reception.parameters.PluginHandlerParameters;
import org.onap.policy.distribution.reception.parameters.PolicyDecoderParameters;
import org.onap.policy.models.tosca.authorative.concepts.ToscaEntity;
/**
* Handles the plugins to policy distribution.
*/
public class PluginHandler {
private Collection<PolicyDecoder<PolicyInput, ToscaEntity>> policyDecoders;
private Collection<PolicyForwarder> policyForwarders;
/**
* Create an instance to instantiate plugins based on the given parameter group.
*
* @param parameterGroupName the name of the parameter group
* @throws PluginInitializationException exception if it occurs
*/
public PluginHandler(final String parameterGroupName) throws PluginInitializationException {
final PluginHandlerParameters params = ParameterService.get(parameterGroupName);
initializePolicyDecoders(params.getPolicyDecoders());
initializePolicyForwarders(params.getPolicyForwarders());
}
/**
* Get the policy decoders.
*
* @return the policy decoders
*/
public Collection<PolicyDecoder<PolicyInput, ToscaEntity>> getPolicyDecoders() {
return policyDecoders;
}
/**
* Get the policy forwarders.
*
* @return the policy forwarders
*/
public Collection<PolicyForwarder> getPolicyForwarders() {
return policyForwarders;
}
/**
* Initialize policy decoders.
*
* @param policyDecoderParameters exception if it occurs
* @throws PluginInitializationException exception if it occurs
*/
@SuppressWarnings("unchecked")
private void initializePolicyDecoders(final Map<String, PolicyDecoderParameters> policyDecoderParameters)
throws PluginInitializationException {
policyDecoders = new ArrayList<>();
for (final PolicyDecoderParameters decoderParameters : policyDecoderParameters.values()) {
try {
final Class<PolicyDecoder<PolicyInput, ToscaEntity>> policyDecoderClass =
(Class<PolicyDecoder<PolicyInput, ToscaEntity>>) Class
.forName(decoderParameters.getDecoderClassName());
final PolicyDecoder<PolicyInput, ToscaEntity> decoder =
policyDecoderClass.getDeclaredConstructor().newInstance();
decoder.configure(decoderParameters.getDecoderConfigurationName());
policyDecoders.add(decoder);
} catch (final ClassNotFoundException | InstantiationException | IllegalAccessException
| IllegalArgumentException | InvocationTargetException | NoSuchMethodException
| SecurityException exp) {
throw new PluginInitializationException(exp.getMessage(), exp.getCause());
}
}
}
/**
* Initialize policy forwarders.
*
* @param policyForwarderParameters exception if it occurs
* @throws PluginInitializationException exception if it occurs
*/
@SuppressWarnings("unchecked")
private void initializePolicyForwarders(final Map<String, PolicyForwarderParameters> policyForwarderParameters)
throws PluginInitializationException {
policyForwarders = new ArrayList<>();
for (final PolicyForwarderParameters forwarderParameters : policyForwarderParameters.values()) {
try {
final Class<PolicyForwarder> policyForwarderClass =
(Class<PolicyForwarder>) Class.forName(forwarderParameters.getForwarderClassName());
final PolicyForwarder policyForwarder = policyForwarderClass.getDeclaredConstructor().newInstance();
policyForwarder.configure(forwarderParameters.getForwarderConfigurationName());
policyForwarders.add(policyForwarder);
} catch (final ClassNotFoundException | InstantiationException | IllegalAccessException
| IllegalArgumentException | InvocationTargetException | NoSuchMethodException
| SecurityException exp) {
throw new PluginInitializationException(exp.getMessage(), exp.getCause());
}
}
}
}
|
