content: /*
   * 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.ambari.server.controller.internal;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.StaticallyInject;
  import org.apache.ambari.server.controller.AmbariManagementController;
  import org.apache.ambari.server.controller.ExtensionLinkRequest;
  import org.apache.ambari.server.controller.RequestStatusResponse;
  import org.apache.ambari.server.controller.spi.NoSuchParentResourceException;
  import org.apache.ambari.server.controller.spi.NoSuchResourceException;
  import org.apache.ambari.server.controller.spi.Predicate;
  import org.apache.ambari.server.controller.spi.Request;
  import org.apache.ambari.server.controller.spi.RequestStatus;
  import org.apache.ambari.server.controller.spi.Resource;
  import org.apache.ambari.server.controller.spi.Resource.Type;
  import org.apache.ambari.server.controller.spi.ResourceAlreadyExistsException;
  import org.apache.ambari.server.controller.spi.SystemException;
  import org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
  import org.apache.ambari.server.controller.utilities.PropertyHelper;
  import org.apache.ambari.server.orm.dao.ExtensionLinkDAO;
  import org.apache.ambari.server.orm.entities.ExtensionLinkEntity;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.Sets;
  import com.google.inject.Inject;
  
  /**
   * An extension version is like a stack version but it contains custom services.  Linking an extension
   * version to the current stack version allows the cluster to install the custom services contained in
   * the extension version.
   */
  @StaticallyInject
  public class ExtensionLinkResourceProvider extends AbstractControllerResourceProvider {
  
    public static final String LINK_ID_PROPERTY_ID = PropertyHelper
        .getPropertyId("ExtensionLink", "link_id");
  
    public static final String STACK_NAME_PROPERTY_ID = PropertyHelper
  	      .getPropertyId("ExtensionLink", "stack_name");
  
    public static final String STACK_VERSION_PROPERTY_ID = PropertyHelper
        .getPropertyId("ExtensionLink", "stack_version");
  
    public static final String EXTENSION_NAME_PROPERTY_ID = PropertyHelper
        .getPropertyId("ExtensionLink", "extension_name");
  
    public static final String EXTENSION_VERSION_PROPERTY_ID = PropertyHelper
        .getPropertyId("ExtensionLink", "extension_version");
  
    /**
     * The key property ids for a ExtensionLink resource.
     */
    private static final Map<Resource.Type, String> keyPropertyIds = ImmutableMap.<Resource.Type, String>builder()
        .put(Type.ExtensionLink, LINK_ID_PROPERTY_ID)
        .put(Type.Stack, STACK_NAME_PROPERTY_ID)
        .put(Type.StackVersion, STACK_VERSION_PROPERTY_ID)
        .put(Type.Extension, EXTENSION_NAME_PROPERTY_ID)
        .put(Type.ExtensionVersion, EXTENSION_VERSION_PROPERTY_ID)
        .build();
  
    /**
     * The property ids for a ExtensionLink resource.
     */
    private static final Set<String> propertyIds = Sets.newHashSet(
        LINK_ID_PROPERTY_ID,
        STACK_NAME_PROPERTY_ID,
        STACK_VERSION_PROPERTY_ID,
        EXTENSION_NAME_PROPERTY_ID,
        EXTENSION_VERSION_PROPERTY_ID);
  
    @Inject
    private static ExtensionLinkDAO dao;
  
    protected ExtensionLinkResourceProvider(AmbariManagementController managementController) {
      super(Type.ExtensionLink, propertyIds, keyPropertyIds, managementController);
    }
  
    @Override
    public RequestStatus createResources(Request request)
  	        throws SystemException, UnsupportedPropertyException,
  	        NoSuchParentResourceException, ResourceAlreadyExistsException {
  
      final Set<ExtensionLinkRequest> requests = new HashSet<>();
      for (Map<String, Object> propertyMap : request.getProperties()) {
        requests.add(getRequest(propertyMap));
      }
  
      createResources(new Command<Void>() {
        @Override
        public Void invoke() throws AmbariException {
          for (ExtensionLinkRequest extensionLinkRequest : requests) {
            getManagementController().createExtensionLink(extensionLinkRequest);
          }
          return null;
        }
      });
  
      if (requests.size() > 0) {
        //Need to reread the stacks/extensions directories so the latest information is available
        try {
          getManagementController().updateStacks();
        } catch (AmbariException e) {
          throw new SystemException(e.getMessage(), e);
        }
  
        notifyCreate(Resource.Type.ExtensionLink, request);
      }
  
      return getRequestStatus(null);
    }
  
    @Override
    protected RequestStatus deleteResourcesAuthorized(Request request, Predicate predicate)
          throws SystemException, UnsupportedPropertyException,
          NoSuchResourceException, NoSuchParentResourceException {
  
      final Set<ExtensionLinkRequest> requests = new HashSet<>();
      if (predicate == null) {
        requests.add(getRequest(Collections.emptyMap()));
      } else {
        for (Map<String, Object> propertyMap : getPropertyMaps(predicate)) {
          requests.add(getRequest(propertyMap));
        }
      }
  
      RequestStatusResponse response = modifyResources(new Command<RequestStatusResponse>() {
        @Override
        public RequestStatusResponse invoke() throws AmbariException {
          for (ExtensionLinkRequest extensionLinkRequest : requests) {
            getManagementController().deleteExtensionLink(extensionLinkRequest);
          }
          return null;
        }
      });
  
      //Need to reread the stacks/extensions directories so the latest information is available
      try {
        getManagementController().updateStacks();
      } catch (AmbariException e) {
        throw new SystemException(e.getMessage(), e);
      }
  
      notifyDelete(Resource.Type.ExtensionLink, predicate);
  
      return getRequestStatus(response);
    }
  
    @Override
    public Set<Resource> getResources(Request request, Predicate predicate)
          throws SystemException, UnsupportedPropertyException,
          NoSuchResourceException, NoSuchParentResourceException {
  
      final Set<Resource> resources = new HashSet<>();
      final Set<String> requestedIds = getRequestPropertyIds(request, predicate);
  
      final Set<ExtensionLinkRequest> requests = new HashSet<>();
      if (predicate == null) {
        requests.add(getRequest(Collections.emptyMap()));
      } else {
        for (Map<String, Object> propertyMap : getPropertyMaps(predicate)) {
          requests.add(getRequest(propertyMap));
        }
      }
  
      Set<ExtensionLinkEntity> entities = new HashSet<>();
  
      for (ExtensionLinkRequest extensionLinkRequest : requests) {
        verifyStackAndExtensionExist(extensionLinkRequest);
        entities.addAll(dao.find(extensionLinkRequest));
      }
  
      for (ExtensionLinkEntity entity : entities) {
        Resource resource = new ResourceImpl(Resource.Type.ExtensionLink);
        setResourceProperty(resource, LINK_ID_PROPERTY_ID,
  		  entity.getLinkId(), requestedIds);
        setResourceProperty(resource, STACK_NAME_PROPERTY_ID,
  	  entity.getStack().getStackName(), requestedIds);
        setResourceProperty(resource, STACK_VERSION_PROPERTY_ID,
            entity.getStack().getStackVersion(), requestedIds);
        setResourceProperty(resource, EXTENSION_NAME_PROPERTY_ID,
            entity.getExtension().getExtensionName(), requestedIds);
        setResourceProperty(resource, EXTENSION_VERSION_PROPERTY_ID,
            entity.getExtension().getExtensionVersion(), requestedIds);
  
        resources.add(resource);
      }
      return resources;
    }
  
    @Override
    public RequestStatus updateResources(Request request, Predicate predicate)
          throws SystemException, UnsupportedPropertyException,
          NoSuchResourceException, NoSuchParentResourceException {
  
      final Set<ExtensionLinkRequest> requests = new HashSet<>();
      for (Map<String, Object> propertyMap : request.getProperties()) {
        requests.add(getRequest(propertyMap));
      }
  
      modifyResources(new Command<RequestStatusResponse>() {
        @Override
        public RequestStatusResponse invoke() throws AmbariException {
          for (ExtensionLinkRequest extensionLinkRequest : requests) {
            getManagementController().updateExtensionLink(extensionLinkRequest);
          }
          return null;
        }
      });
  
      //Need to reread the stacks/extensions directories so the latest information is available
      try {
        getManagementController().updateStacks();
      } catch (AmbariException e) {
        throw new SystemException(e.getMessage(), e);
      }
  
      notifyUpdate(Resource.Type.ExtensionLink, request, predicate);
      return getRequestStatus(null);
    }
  
    private void verifyStackAndExtensionExist(ExtensionLinkRequest request) throws NoSuchParentResourceException {
      try {
        if (request.getStackName() != null && request.getStackVersion() != null) {
          getManagementController().getAmbariMetaInfo().getStack(request.getStackName(), request.getStackVersion());
        }
        if (request.getExtensionName() != null && request.getExtensionVersion() != null) {
          getManagementController().getAmbariMetaInfo().getExtension(request.getExtensionName(), request.getExtensionVersion());
        }
      }
      catch (AmbariException ambariException) {
        throw new NoSuchParentResourceException(ambariException.getMessage());
      }
    }
  
    private ExtensionLinkRequest getRequest(Map<String, Object> properties) {
      return new ExtensionLinkRequest(
          (String) properties.get(LINK_ID_PROPERTY_ID),
          (String) properties.get(STACK_NAME_PROPERTY_ID),
          (String) properties.get(STACK_VERSION_PROPERTY_ID),
          (String) properties.get(EXTENSION_NAME_PROPERTY_ID),
          (String) properties.get(EXTENSION_VERSION_PROPERTY_ID));
    }
  
    private ExtensionLinkRequest createExtensionLinkRequest(ExtensionLinkEntity entity) {
      if (entity == null) {
        return null;
      }
  
      return new ExtensionLinkRequest(String.valueOf(entity.getLinkId()),
          entity.getStack().getStackName(),
          entity.getStack().getStackVersion(),
          entity.getExtension().getExtensionName(),
          entity.getExtension().getExtensionVersion());
    }
  
    @Override
    protected Set<String> getPKPropertyIds() {
      return new HashSet<>(keyPropertyIds.values());
    }
  }
  