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From olegz <...@git.apache.org>
Subject [GitHub] nifi pull request: NIFI-1727: Refactored logic for merging HTTP Re...
Date Mon, 18 Apr 2016 16:32:22 GMT
Github user olegz commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/338#discussion_r60090174
  
    --- Diff: nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-cluster/src/main/java/org/apache/nifi/cluster/coordination/http/endpoints/ControllerStatusEndpointMerger.java
---
    @@ -0,0 +1,83 @@
    +/*
    + * 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.Map;
    +import java.util.Set;
    +import java.util.regex.Pattern;
    +
    +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.BulletinDTO;
    +import org.apache.nifi.web.api.dto.status.ControllerStatusDTO;
    +import org.apache.nifi.web.api.entity.ControllerStatusEntity;
    +
    +public class ControllerStatusEndpointMerger extends AbstractSingleEntityEndpoint<ControllerStatusEntity,
ControllerStatusDTO> {
    +    public static final Pattern CONTROLLER_STATUS_URI_PATTERN = Pattern.compile("/nifi-api/controller/status");
    +
    +    @Override
    +    public boolean canHandle(URI uri, String method) {
    +        return "GET".equalsIgnoreCase(method) && CONTROLLER_STATUS_URI_PATTERN.matcher(uri.getPath()).matches();
    +    }
    +
    +    @Override
    +    protected Class<ControllerStatusEntity> getEntityClass() {
    +        return ControllerStatusEntity.class;
    +    }
    +
    +    @Override
    +    protected ControllerStatusDTO getDto(ControllerStatusEntity entity) {
    +        return entity.getControllerStatus();
    +    }
    +
    +    @Override
    +    protected void mergeResponses(ControllerStatusDTO clientDto, Map<NodeIdentifier,
ControllerStatusDTO> dtoMap, Set<NodeResponse> successfulResponses, Set<NodeResponse>
problematicResponses) {
    +        ControllerStatusDTO mergedStatus = clientDto;
    +        for (final Map.Entry<NodeIdentifier, ControllerStatusDTO> entry : dtoMap.entrySet())
{
    +            final NodeIdentifier nodeId = entry.getKey();
    +            final ControllerStatusDTO nodeStatus = entry.getValue();
    +
    +            final String nodeAddress = nodeId.getApiAddress() + ":" + nodeId.getApiPort();
    +            for (final BulletinDTO bulletin : nodeStatus.getBulletins()) {
    +                bulletin.setNodeAddress(nodeAddress);
    +            }
    +            for (final BulletinDTO bulletin : nodeStatus.getControllerServiceBulletins())
{
    +                bulletin.setNodeAddress(nodeAddress);
    +            }
    +            for (final BulletinDTO bulletin : nodeStatus.getReportingTaskBulletins())
{
    +                bulletin.setNodeAddress(nodeAddress);
    +            }
    --- End diff --
    
    Also, since we are using Java 8 this could be further simplified into a single line
    ```
    Stream.concat(nodeStatus.getBulletins(), nodeStatus.getControllerServiceBulletins(), nodeStatus.getReportingTaskBulletins()).forEach(bulletin::
setNodeAddress)
    ```


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