/*
* 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 java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import org.apache.nifi.cluster.coordination.http.EndpointResponseMerger;
import org.apache.nifi.cluster.manager.NodeResponse;
import org.apache.nifi.cluster.protocol.NodeIdentifier;
import org.apache.nifi.web.api.dto.flow.FlowDTO;
import org.apache.nifi.web.api.entity.FlowEntity;
import org.apache.nifi.web.api.entity.ProcessorEntity;
import org.apache.nifi.web.api.entity.RemoteProcessGroupEntity;
public class FlowSnippetEndpointMerger implements EndpointResponseMerger {
public static final Pattern TEMPLATE_INSTANCE_URI_PATTERN = Pattern.compile("/nifi-api/process-groups/(?:(?:root)|(?:[a-f0-9\\-]{36}))/template-instance");
public static final Pattern FLOW_SNIPPET_INSTANCE_URI_PATTERN = Pattern.compile("/nifi-api/process-groups/(?:(?:root)|(?:[a-f0-9\\-]{36}))/snippet-instance");
@Override
public boolean canHandle(final URI uri, final String method) {
return "POST".equalsIgnoreCase(method) && (TEMPLATE_INSTANCE_URI_PATTERN.matcher(uri.getPath()).matches()
|| FLOW_SNIPPET_INSTANCE_URI_PATTERN.matcher(uri.getPath()).matches());
}
@Override
public NodeResponse merge(final URI uri, final String method, Set<NodeResponse> successfulResponses, final Set<NodeResponse> problematicResponses, final NodeResponse clientResponse) {
final FlowEntity responseEntity = clientResponse.getClientResponse().getEntity(FlowEntity.class);
final FlowDTO flowDto = responseEntity.getFlow();
if (flowDto == null) {
return clientResponse;
} else {
final Map<String, Map<NodeIdentifier, ProcessorEntity>> processorMap = new HashMap<>();
final Map<String, Map<NodeIdentifier, RemoteProcessGroupEntity>> remoteProcessGroupMap = new HashMap<>();
for (final NodeResponse nodeResponse : successfulResponses) {
final FlowEntity nodeResponseEntity = nodeResponse == clientResponse ? responseEntity : nodeResponse.getClientResponse().getEntity(FlowEntity.class);
final FlowDTO nodeContents = nodeResponseEntity.getFlow();
for (final ProcessorEntity nodeProcessor : nodeContents.getProcessors()) {
Map<NodeIdentifier, ProcessorEntity> innerMap = processorMap.computeIfAbsent(nodeProcessor.getId(), id -> new HashMap<>());
innerMap.put(nodeResponse.getNodeId(), nodeProcessor);
}
for (final RemoteProcessGroupEntity nodeRemoteProcessGroup : nodeContents.getRemoteProcessGroups()) {
Map<NodeIdentifier, RemoteProcessGroupEntity> innerMap = remoteProcessGroupMap.computeIfAbsent(nodeRemoteProcessGroup.getId(), id -> new HashMap<>());
innerMap.put(nodeResponse.getNodeId(), nodeRemoteProcessGroup);
}
}
final ProcessorEndpointMerger procMerger = new ProcessorEndpointMerger();
for (final ProcessorEntity processor : flowDto.getProcessors()) {
final String procId = processor.getId();
final Map<NodeIdentifier, ProcessorEntity> mergeMap = processorMap.get(procId);
procMerger.mergeResponses(processor, mergeMap, successfulResponses, problematicResponses);
}
final RemoteProcessGroupEndpointMerger rpgMerger = new RemoteProcessGroupEndpointMerger();
for (final RemoteProcessGroupEntity remoteProcessGroup : flowDto.getRemoteProcessGroups()) {
final String remoteProcessGroupId = remoteProcessGroup.getId();
final Map<NodeIdentifier, RemoteProcessGroupEntity> mergeMap = remoteProcessGroupMap.get(remoteProcessGroupId);
rpgMerger.mergeResponses(remoteProcessGroup, mergeMap, successfulResponses, problematicResponses);
}
}
// create a new client response
return new NodeResponse(clientResponse, responseEntity);
}
}