| /* |
| * Crail: A Multi-tiered Distributed Direct Access File System |
| * |
| * Author: Patrick Stuedi <stu@zurich.ibm.com> |
| * |
| * Copyright (C) 2016, IBM Corporation |
| * |
| * Licensed 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 com.ibm.crail.rpc; |
| |
| import java.io.IOException; |
| |
| import com.ibm.crail.CrailNodeType; |
| import com.ibm.crail.metadata.BlockInfo; |
| import com.ibm.crail.metadata.DataNodeInfo; |
| import com.ibm.crail.metadata.FileInfo; |
| import com.ibm.crail.metadata.FileName; |
| |
| public interface RpcConnection { |
| public abstract RpcFuture<RpcCreateFile> createFile( |
| FileName filename, CrailNodeType type, int storageClass, int locationClass) throws IOException; |
| |
| public abstract RpcFuture<RpcGetFile> getFile(FileName filename, |
| boolean writeable) throws IOException; |
| |
| public abstract RpcFuture<RpcVoid> setFile(FileInfo fileInfo, |
| boolean close) throws IOException; |
| |
| public abstract RpcFuture<RpcDeleteFile> removeFile( |
| FileName filename, boolean recursive) throws IOException; |
| |
| public abstract RpcFuture<RpcRenameFile> renameFile( |
| FileName srcHash, FileName dstHash) throws IOException; |
| |
| public abstract RpcFuture<RpcGetBlock> getBlock(long fd, |
| long token, long position, long capacity) throws IOException; |
| |
| public abstract RpcFuture<RpcGetLocation> getLocation( |
| FileName fileName, long position) throws IOException; |
| |
| public abstract RpcFuture<RpcVoid> setBlock(BlockInfo blockInfo) |
| throws Exception; |
| |
| public abstract RpcFuture<RpcGetDataNode> getDataNode( |
| DataNodeInfo dnInfo) throws Exception; |
| |
| public abstract RpcFuture<RpcVoid> dumpNameNode() |
| throws Exception; |
| |
| public abstract RpcFuture<RpcPing> pingNameNode() |
| throws Exception; |
| |
| public abstract void close() throws Exception; |
| |
| @SuppressWarnings("unchecked") |
| public static RpcConnection createInstance(String name) throws Exception { |
| Class<?> nodeClass = Class.forName(name); |
| if (RpcConnection.class.isAssignableFrom(nodeClass)){ |
| Class<? extends RpcConnection> rpcClass = (Class<? extends RpcConnection>) nodeClass; |
| RpcConnection rpcInstance = rpcClass.newInstance(); |
| return rpcInstance; |
| } else { |
| throw new Exception("Cannot instantiate RPC client of type " + name); |
| } |
| } |
| } |
| |