| /* |
| * |
| * 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.crail.storage.nvmf; |
| |
| import com.ibm.jnvmf.Nvme; |
| import org.apache.crail.CrailBufferCache; |
| import org.apache.crail.CrailStatistics; |
| import org.apache.crail.conf.CrailConfiguration; |
| import org.apache.crail.metadata.DataNodeInfo; |
| import org.apache.crail.storage.StorageClient; |
| import org.apache.crail.storage.StorageEndpoint; |
| import org.apache.crail.storage.nvmf.client.NvmfStorageEndpoint; |
| import org.apache.crail.utils.CrailUtils; |
| import org.slf4j.Logger; |
| |
| import java.io.IOException; |
| import java.net.UnknownHostException; |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| public class NvmfStorageClient implements StorageClient { |
| private static final Logger LOG = CrailUtils.getLogger(); |
| private static Nvme nvme; |
| private boolean initialized; |
| private volatile boolean closing; |
| private final Thread keepAliveThread; |
| private List<NvmfStorageEndpoint> endpoints; |
| private CrailStatistics statistics; |
| private CrailBufferCache bufferCache; |
| |
| public NvmfStorageClient() { |
| this.initialized = false; |
| this.endpoints = new CopyOnWriteArrayList<>(); |
| this.closing = false; |
| this.keepAliveThread = new Thread(() -> { |
| while (!closing) { |
| for (NvmfStorageEndpoint endpoint : endpoints) { |
| try { |
| endpoint.keepAlive(); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| return; |
| } |
| } |
| try { |
| Thread.sleep(NvmfStorageConstants.KEEP_ALIVE_INTERVAL_MS); |
| } catch (InterruptedException e) { |
| return; |
| } |
| } |
| }); |
| this.keepAliveThread.setDaemon(true); |
| } |
| |
| boolean isAlive() { |
| return keepAliveThread.isAlive(); |
| } |
| |
| public void init(CrailStatistics statistics, CrailBufferCache bufferCache, CrailConfiguration crailConfiguration, |
| String[] args) throws IOException { |
| if (initialized) { |
| throw new IOException("NvmfStorageTier already initialized"); |
| } |
| initialized = true; |
| this.statistics = statistics; |
| this.bufferCache = bufferCache; |
| LOG.info("Initialize Nvmf storage client"); |
| NvmfStorageConstants.parseCmdLine(crailConfiguration, args); |
| keepAliveThread.start(); |
| } |
| |
| public void printConf(Logger logger) { |
| NvmfStorageConstants.printConf(logger); |
| } |
| |
| private static Nvme getEndpointGroup() { |
| if (nvme == null) { |
| if (NvmfStorageConstants.HOST_NQN == null) { |
| nvme = new Nvme(); |
| } else { |
| nvme = new Nvme(NvmfStorageConstants.HOST_NQN); |
| } |
| } |
| return nvme; |
| } |
| |
| public synchronized StorageEndpoint createEndpoint(DataNodeInfo info) throws IOException { |
| if (!isAlive()) { |
| throw new IOException("Storage client is not alive"); |
| } |
| NvmfStorageEndpoint endpoint = new NvmfStorageEndpoint(getEndpointGroup(), info, statistics, bufferCache); |
| endpoints.add(endpoint); |
| return endpoint; |
| } |
| |
| public void close() throws Exception { |
| if (!closing) { |
| closing = true; |
| keepAliveThread.interrupt(); |
| keepAliveThread.join(); |
| for (StorageEndpoint endpoint : endpoints) { |
| endpoint.close(); |
| } |
| } |
| } |
| |
| } |