/*
* 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.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import org.apache.nifi.cluster.manager.NodeResponse;
import org.apache.nifi.cluster.protocol.NodeIdentifier;
import org.apache.nifi.controller.state.SortedStateUtils;
import org.apache.nifi.web.api.dto.ComponentStateDTO;
import org.apache.nifi.web.api.dto.StateEntryDTO;
import org.apache.nifi.web.api.dto.StateMapDTO;
import org.apache.nifi.web.api.entity.ComponentStateEntity;
public class ComponentStateEndpointMerger extends AbstractSingleDTOEndpoint<ComponentStateEntity, ComponentStateDTO> {
public static final Pattern PROCESSOR_STATE_URI_PATTERN = Pattern.compile("/nifi-api/processors/[a-f0-9\\-]{36}/state");
public static final Pattern CONTROLLER_SERVICE_STATE_URI_PATTERN = Pattern.compile("/nifi-api/controller-services/[a-f0-9\\-]{36}/state");
public static final Pattern REPORTING_TASK_STATE_URI_PATTERN = Pattern.compile("/nifi-api/reporting-tasks/[a-f0-9\\-]{36}/state");
@Override
public boolean canHandle(URI uri, String method) {
if (!"GET".equalsIgnoreCase(method)) {
return false;
}
return PROCESSOR_STATE_URI_PATTERN.matcher(uri.getPath()).matches()
|| CONTROLLER_SERVICE_STATE_URI_PATTERN.matcher(uri.getPath()).matches()
|| REPORTING_TASK_STATE_URI_PATTERN.matcher(uri.getPath()).matches();
}
@Override
protected Class<ComponentStateEntity> getEntityClass() {
return ComponentStateEntity.class;
}
@Override
protected ComponentStateDTO getDto(ComponentStateEntity entity) {
return entity.getComponentState();
}
@Override
protected void mergeResponses(ComponentStateDTO clientDto, Map<NodeIdentifier, ComponentStateDTO> dtoMap, Set<NodeResponse> successfulResponses, Set<NodeResponse> problematicResponses) {
List<StateEntryDTO> localStateEntries = new ArrayList<>();
int totalStateEntries = 0;
for (final Map.Entry<NodeIdentifier, ComponentStateDTO> nodeEntry : dtoMap.entrySet()) {
final ComponentStateDTO nodeComponentState = nodeEntry.getValue();
final NodeIdentifier nodeId = nodeEntry.getKey();
final String nodeAddress = nodeId.getApiAddress() + ":" + nodeId.getApiPort();
final StateMapDTO nodeLocalStateMap = nodeComponentState.getLocalState();
if (nodeLocalStateMap.getState() != null) {
totalStateEntries += nodeLocalStateMap.getTotalEntryCount();
for (final StateEntryDTO nodeStateEntry : nodeLocalStateMap.getState()) {
if (nodeStateEntry.getClusterNodeId() == null || nodeStateEntry.getClusterNodeAddress() == null) {
nodeStateEntry.setClusterNodeId(nodeId.getId());
nodeStateEntry.setClusterNodeAddress(nodeAddress);
}
localStateEntries.add(nodeStateEntry);
}
}
}
// ensure appropriate sort
Collections.sort(localStateEntries, SortedStateUtils.getEntryDtoComparator());
// sublist if necessary
if (localStateEntries.size() > SortedStateUtils.MAX_COMPONENT_STATE_ENTRIES) {
localStateEntries = localStateEntries.subList(0, SortedStateUtils.MAX_COMPONENT_STATE_ENTRIES);
}
// add all the local state entries
clientDto.getLocalState().setTotalEntryCount(totalStateEntries);
clientDto.getLocalState().setState(localStateEntries);
}
}