View Javadoc
1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.eclipse.aether.spi.connector;
20  
21  import org.eclipse.aether.RepositorySystemSession;
22  import org.eclipse.aether.repository.RemoteRepository;
23  import org.eclipse.aether.transfer.NoRepositoryConnectorException;
24  
25  /**
26   * A factory to create repository connectors. A repository connector is responsible for uploads/downloads to/from a
27   * certain kind of remote repository. When the repository system needs a repository connector for a given remote
28   * repository, it iterates the registered factories in descending order of their priority and calls
29   * {@link #newInstance(RepositorySystemSession, RemoteRepository)} on them. The first connector returned by a factory
30   * will then be used for the transfer.
31   */
32  public interface RepositoryConnectorFactory {
33  
34      /**
35       * Tries to create a repository connector for the specified remote repository. Typically, a factory will inspect
36       * {@link RemoteRepository#getProtocol()} and {@link RemoteRepository#getContentType()} to determine whether it can
37       * handle a repository.
38       *
39       * @param session The repository system session from which to configure the connector, must not be {@code null}. In
40       *            particular, a connector must notify any {@link RepositorySystemSession#getTransferListener()} set for
41       *            the session and should obey the timeouts configured for the session.
42       * @param repository The remote repository to create a connector for, must not be {@code null}.
43       * @return The connector for the given repository, never {@code null}.
44       * @throws NoRepositoryConnectorException If the factory cannot create a connector for the specified remote
45       *             repository.
46       */
47      RepositoryConnector newInstance(RepositorySystemSession session, RemoteRepository repository)
48              throws NoRepositoryConnectorException;
49  
50      /**
51       * The priority of this factory. When multiple factories can handle a given repository, factories with higher
52       * priority are preferred over those with lower priority.
53       *
54       * @return The priority of this factory.
55       */
56      float getPriority();
57  }