Java tutorial
/* * 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.shindig.social.opensocial.service; import org.apache.shindig.config.ContainerConfig; import org.apache.shindig.protocol.HandlerPreconditions; import org.apache.shindig.protocol.Operation; import org.apache.shindig.protocol.ProtocolException; import org.apache.shindig.protocol.RequestItem; import org.apache.shindig.protocol.Service; import org.apache.shindig.social.opensocial.model.Activity; import org.apache.shindig.social.opensocial.spi.ActivityService; import org.apache.shindig.social.opensocial.spi.CollectionOptions; import org.apache.shindig.social.opensocial.spi.UserId; import com.google.common.base.Objects; import com.google.common.collect.ImmutableSet; import com.google.common.collect.Iterables; import com.google.inject.Inject; import java.util.List; import java.util.Set; import java.util.concurrent.Future; /** * Rest/RPC handler for all activites related requests */ @Service(name = "activities", path = "/{userId}+/{groupId}/{appId}/{activityId}+") public class ActivityHandler { private final ActivityService service; private final ContainerConfig config; @Inject public ActivityHandler(ActivityService service, ContainerConfig config) { this.service = service; this.config = config; } /** * Allowed end-points /activities/{userId}/@self/{actvityId}+ * * examples: /activities/john.doe/@self/1 */ @Operation(httpMethods = "DELETE") public Future<?> delete(SocialRequestItem request) throws ProtocolException { Set<UserId> userIds = request.getUsers(); Set<String> activityIds = ImmutableSet.copyOf(request.getListParameter("activityId")); HandlerPreconditions.requireNotEmpty(userIds, "No userId specified"); HandlerPreconditions.requireSingular(userIds, "Multiple userIds not supported"); // Throws exceptions if userIds contains more than one element or zero elements return service.deleteActivities(Iterables.getOnlyElement(userIds), request.getGroup(), request.getAppId(), activityIds, request.getToken()); } /** * Allowed end-points /activities/{userId}/@self * * examples: /activities/john.doe/@self - postBody is an activity object */ @Operation(httpMethods = "PUT", bodyParam = "activity") public Future<?> update(SocialRequestItem request) throws ProtocolException { return create(request); } /** * Allowed end-points /activities/{userId}/@self * * examples: /activities/john.doe/@self - postBody is an activity object */ @Operation(httpMethods = "POST", bodyParam = "activity") public Future<?> create(SocialRequestItem request) throws ProtocolException { Set<UserId> userIds = request.getUsers(); List<String> activityIds = request.getListParameter("activityId"); HandlerPreconditions.requireNotEmpty(userIds, "No userId specified"); HandlerPreconditions.requireSingular(userIds, "Multiple userIds not supported"); // TODO(lryan) This seems reasonable to allow on PUT but we don't have an update verb. HandlerPreconditions.requireEmpty(activityIds, "Cannot specify activityId in create"); return service.createActivity(Iterables.getOnlyElement(userIds), request.getGroup(), request.getAppId(), request.getFields(), request.getTypedParameter("activity", Activity.class), request.getToken()); } /** * Allowed end-points /activities/{userId}/{groupId}/{optionalActvityId}+ * /activities/{userId}+/{groupId} * * examples: /activities/john.doe/@self/1 /activities/john.doe/@self * /activities/john.doe,jane.doe/@friends */ @Operation(httpMethods = "GET") public Future<?> get(SocialRequestItem request) throws ProtocolException { Set<UserId> userIds = request.getUsers(); Set<String> optionalActivityIds = ImmutableSet.copyOf(request.getListParameter("activityId")); CollectionOptions options = new CollectionOptions(request); // Preconditions HandlerPreconditions.requireNotEmpty(userIds, "No userId specified"); if (userIds.size() > 1 && !optionalActivityIds.isEmpty()) { throw new IllegalArgumentException("Cannot fetch same activityIds for multiple userIds"); } if (!optionalActivityIds.isEmpty()) { if (optionalActivityIds.size() == 1) { return service.getActivity(userIds.iterator().next(), request.getGroup(), request.getAppId(), request.getFields(), optionalActivityIds.iterator().next(), request.getToken()); } else { return service.getActivities(userIds.iterator().next(), request.getGroup(), request.getAppId(), request.getFields(), options, optionalActivityIds, request.getToken()); } } return service.getActivities(userIds, request.getGroup(), request.getAppId(), // TODO: add pagination and sorting support // getSortBy(params), getFilterBy(params), getStartIndex(params), getCount(params), request.getFields(), options, request.getToken()); } @Operation(httpMethods = "GET", path = "/@supportedFields") public List<Object> supportedFields(RequestItem request) { // TODO: Would be nice if name in config matched name of service. String container = Objects.firstNonNull(request.getToken().getContainer(), ContainerConfig.DEFAULT_CONTAINER); return config.getList(container, "${Cur['gadgets.features'].opensocial.supportedFields.activity}"); } }