/*
* 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.manager.ComponentEntityStatusMerger;
import org.apache.nifi.cluster.manager.NodeResponse;
import org.apache.nifi.cluster.manager.StatusMerger;
import org.apache.nifi.cluster.protocol.NodeIdentifier;
import org.apache.nifi.web.api.dto.status.NodePortStatusSnapshotDTO;
import org.apache.nifi.web.api.dto.status.PortStatusDTO;
import org.apache.nifi.web.api.entity.PortStatusEntity;
import java.net.URI;
import java.util.ArrayList;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
public class PortStatusEndpointMerger extends AbstractSingleEntityEndpoint<PortStatusEntity> implements ComponentEntityStatusMerger<PortStatusDTO> {
public static final Pattern INPUT_PORT_STATUS_URI_PATTERN = Pattern.compile("/nifi-api/flow/input-ports/[a-f0-9\\-]{36}/status");
public static final Pattern OUTPUT_PORT_STATUS_URI_PATTERN = Pattern.compile("/nifi-api/flow/output-ports/[a-f0-9\\-]{36}/status");
@Override
public boolean canHandle(URI uri, String method) {
return "GET".equalsIgnoreCase(method) && (INPUT_PORT_STATUS_URI_PATTERN.matcher(uri.getPath()).matches() || OUTPUT_PORT_STATUS_URI_PATTERN.matcher(uri.getPath()).matches());
}
@Override
protected Class<PortStatusEntity> getEntityClass() {
return PortStatusEntity.class;
}
@Override
protected void mergeResponses(PortStatusEntity clientEntity, Map<NodeIdentifier, PortStatusEntity> entityMap, Set<NodeResponse> successfulResponses, Set<NodeResponse> problematicResponses) {
final PortStatusDTO mergedPortStatus = clientEntity.getPortStatus();
mergedPortStatus.setNodeSnapshots(new ArrayList<>());
final NodeIdentifier selectedNodeId = entityMap.entrySet().stream()
.filter(e -> e.getValue() == clientEntity)
.map(e -> e.getKey())
.findFirst()
.orElse(null);
if (selectedNodeId == null) {
throw new IllegalArgumentException("Attempted to merge Status request but could not find the appropriate Node Identifier");
}
final NodePortStatusSnapshotDTO selectedNodeSnapshot = new NodePortStatusSnapshotDTO();
selectedNodeSnapshot.setStatusSnapshot(mergedPortStatus.getAggregateSnapshot().clone());
selectedNodeSnapshot.setAddress(selectedNodeId.getApiAddress());
selectedNodeSnapshot.setApiPort(selectedNodeId.getApiPort());
selectedNodeSnapshot.setNodeId(selectedNodeId.getId());
mergedPortStatus.getNodeSnapshots().add(selectedNodeSnapshot);
// merge the other nodes
for (final Map.Entry<NodeIdentifier, PortStatusEntity> entry : entityMap.entrySet()) {
final NodeIdentifier nodeId = entry.getKey();
final PortStatusEntity nodePortStatusEntity = entry.getValue();
final PortStatusDTO nodePortStatus = nodePortStatusEntity.getPortStatus();
if (nodePortStatus == mergedPortStatus) {
continue;
}
mergeStatus(mergedPortStatus, clientEntity.getCanRead(), nodePortStatus, nodePortStatusEntity.getCanRead(), nodeId);
}
}
@Override
public void mergeStatus(PortStatusDTO clientStatus, boolean clientStatusReadablePermission, PortStatusDTO status, boolean statusReadablePermission,
NodeIdentifier statusNodeIdentifier) {
StatusMerger.merge(clientStatus, clientStatusReadablePermission, status, statusReadablePermission, statusNodeIdentifier.getId(), statusNodeIdentifier.getApiAddress(),
statusNodeIdentifier.getApiPort());
}
}