/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.nifi.cluster.coordination.http.endpoints;
import org.apache.nifi.cluster.coordination.http.EndpointResponseMerger;
import org.apache.nifi.cluster.manager.NodeResponse;
import org.apache.nifi.cluster.manager.ProcessorsEntityMerger;
import org.apache.nifi.cluster.protocol.NodeIdentifier;
import org.apache.nifi.web.api.entity.ProcessorEntity;
import org.apache.nifi.web.api.entity.ProcessorsEntity;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
public class ProcessorsEndpointMerger implements EndpointResponseMerger {
public static final Pattern PROCESSORS_URI_PATTERN = Pattern.compile("/nifi-api/process-groups/(?:(?:root)|(?:[a-f0-9\\-]{36}))/processors");
@Override
public boolean canHandle(final URI uri, final String method) {
return "GET".equalsIgnoreCase(method) && PROCESSORS_URI_PATTERN.matcher(uri.getPath()).matches();
}
@Override
public final NodeResponse merge(final URI uri, final String method, final Set<NodeResponse> successfulResponses, final Set<NodeResponse> problematicResponses, final NodeResponse clientResponse) {
if (!canHandle(uri, method)) {
throw new IllegalArgumentException("Cannot use Endpoint Mapper of type " + getClass().getSimpleName() + " to map responses for URI " + uri + ", HTTP Method " + method);
}
final ProcessorsEntity responseEntity = clientResponse.getClientResponse().getEntity(ProcessorsEntity.class);
final Set<ProcessorEntity> processorEntities = responseEntity.getProcessors();
final Map<String, Map<NodeIdentifier, ProcessorEntity>> entityMap = new HashMap<>();
for (final NodeResponse nodeResponse : successfulResponses) {
final ProcessorsEntity nodeResponseEntity = nodeResponse == clientResponse ? responseEntity : nodeResponse.getClientResponse().getEntity(ProcessorsEntity.class);
final Set<ProcessorEntity> nodeProcessorEntities = nodeResponseEntity.getProcessors();
for (final ProcessorEntity nodeProcessorEntity : nodeProcessorEntities) {
final NodeIdentifier nodeId = nodeResponse.getNodeId();
Map<NodeIdentifier, ProcessorEntity> innerMap = entityMap.get(nodeId);
if (innerMap == null) {
innerMap = new HashMap<>();
entityMap.put(nodeProcessorEntity.getId(), innerMap);
}
innerMap.put(nodeResponse.getNodeId(), nodeProcessorEntity);
}
}
ProcessorsEntityMerger.mergeProcessors(processorEntities, entityMap);
// create a new client response
return new NodeResponse(clientResponse, responseEntity);
}
}