| /* |
| * 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.sling.distribution.agent.spi; |
| |
| import javax.annotation.CheckForNull; |
| import javax.annotation.Nonnull; |
| |
| import aQute.bnd.annotation.ConsumerType; |
| import org.apache.sling.api.resource.ResourceResolver; |
| import org.apache.sling.distribution.DistributionRequest; |
| import org.apache.sling.distribution.DistributionResponse; |
| import org.apache.sling.distribution.agent.DistributionAgentState; |
| import org.apache.sling.distribution.common.DistributionException; |
| import org.apache.sling.distribution.log.spi.DistributionLog; |
| import org.apache.sling.distribution.queue.spi.DistributionQueue; |
| |
| /** |
| * A distribution agent is responsible for handling {@link org.apache.sling.distribution.DistributionRequest}s. |
| * <p/> |
| * This means executing actions of e.g.: a specific {@link org.apache.sling.distribution.DistributionRequestType}s on |
| * specific path(s) which will resume pulling resources from a certain Sling instance and / or pushing resources to |
| * other instances. |
| */ |
| @ConsumerType |
| public interface DistributionAgent { |
| |
| /** |
| * Retrieves the names of the queues for this agent. |
| * |
| * @return the list of queue names |
| */ |
| @Nonnull |
| Iterable<String> getQueueNames(); |
| |
| /** |
| * Get the agent queue with the given name |
| * |
| * @param name a queue name |
| * @return a {@link DistributionQueue} with the given name bound to this agent, if it exists, |
| * {@code null} otherwise |
| */ |
| @CheckForNull |
| DistributionQueue getQueue(@Nonnull String name); |
| |
| /** |
| * Get the agent log |
| * @return the log for this agent |
| */ |
| @Nonnull |
| DistributionLog getLog(); |
| |
| /** |
| * returns the state of the agent |
| * @return the agent state |
| */ |
| @Nonnull |
| DistributionAgentState getState(); |
| |
| /** |
| * Perform a {@link org.apache.sling.distribution.DistributionRequest} to distribute content from a source |
| * instance to a target instance. |
| * The content to be sent will be assembled according to the information contained in the request. |
| * A {@link org.apache.sling.distribution.DistributionResponse} holding the {@link org.apache.sling.distribution.DistributionRequestState} |
| * of the provided request will be returned. |
| * Synchronous {@link DistributionAgent}s will usually block until the execution has finished |
| * while asynchronous agents will usually return the response as soon as the content to be distributed has been assembled |
| * and scheduled for distribution. |
| * |
| * @param distributionRequest the distribution request |
| * @param resourceResolver the resource resolver used for authorizing the request, |
| * @return a {@link org.apache.sling.distribution.DistributionResponse} |
| * @throws DistributionException if any error happens during the execution of the request or if the authentication fails |
| */ |
| @Nonnull |
| DistributionResponse execute(@Nonnull ResourceResolver resourceResolver, @Nonnull DistributionRequest distributionRequest) throws DistributionException; |
| |
| } |