| /* |
| * 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.hadoop.ozone.container.common.volume; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.fs.StorageType; |
| import org.apache.hadoop.hdds.conf.ConfigurationSource; |
| import org.apache.hadoop.hdds.fs.SpaceUsageCheckFactory; |
| import org.apache.hadoop.hdds.fs.SpaceUsageCheckParams; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Stores information about a disk/volume. |
| */ |
| public final class VolumeInfo { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(VolumeInfo.class); |
| |
| private final String rootDir; |
| private final StorageType storageType; |
| |
| // Space usage calculator |
| private final VolumeUsage usage; |
| |
| // Capacity configured. This is useful when we want to |
| // limit the visible capacity for tests. If negative, then we just |
| // query from the filesystem. |
| private long configuredCapacity; |
| |
| /** |
| * Builder for VolumeInfo. |
| */ |
| public static class Builder { |
| private final ConfigurationSource conf; |
| private final String rootDir; |
| private SpaceUsageCheckFactory usageCheckFactory; |
| private StorageType storageType; |
| private long configuredCapacity; |
| |
| public Builder(String root, ConfigurationSource config) { |
| this.rootDir = root; |
| this.conf = config; |
| } |
| |
| public Builder storageType(StorageType st) { |
| this.storageType = st; |
| return this; |
| } |
| |
| public Builder configuredCapacity(long capacity) { |
| this.configuredCapacity = capacity; |
| return this; |
| } |
| |
| public Builder usageCheckFactory(SpaceUsageCheckFactory factory) { |
| this.usageCheckFactory = factory; |
| return this; |
| } |
| |
| public VolumeInfo build() throws IOException { |
| return new VolumeInfo(this); |
| } |
| } |
| |
| private VolumeInfo(Builder b) throws IOException { |
| |
| this.rootDir = b.rootDir; |
| File root = new File(this.rootDir); |
| |
| boolean succeeded = root.isDirectory() || root.mkdirs(); |
| |
| if (!succeeded) { |
| LOG.error("Unable to create the volume root dir at : {}", root); |
| throw new IOException("Unable to create the volume root dir at " + root); |
| } |
| |
| this.storageType = (b.storageType != null ? |
| b.storageType : StorageType.DEFAULT); |
| |
| this.configuredCapacity = (b.configuredCapacity != 0 ? |
| b.configuredCapacity : -1); |
| |
| SpaceUsageCheckFactory usageCheckFactory = b.usageCheckFactory; |
| if (usageCheckFactory == null) { |
| usageCheckFactory = SpaceUsageCheckFactory.create(b.conf); |
| } |
| SpaceUsageCheckParams checkParams = |
| usageCheckFactory.paramsFor(root); |
| |
| this.usage = new VolumeUsage(checkParams); |
| } |
| |
| public long getCapacity() { |
| if (configuredCapacity < 0) { |
| return usage.getCapacity(); |
| } |
| return configuredCapacity; |
| } |
| |
| public long getAvailable() { |
| return usage.getAvailable(); |
| } |
| |
| public long getScmUsed() { |
| return usage.getUsedSpace(); |
| } |
| |
| void start() { |
| usage.start(); |
| } |
| |
| void shutdownUsageThread() { |
| usage.shutdown(); |
| } |
| |
| public String getRootDir() { |
| return this.rootDir; |
| } |
| |
| public StorageType getStorageType() { |
| return this.storageType; |
| } |
| |
| /** |
| * Only for testing. Do not use otherwise. |
| */ |
| @VisibleForTesting |
| public VolumeUsage getUsageForTesting() { |
| return usage; |
| } |
| } |