| /* |
| * 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.beam.runners.direct.portable.artifact; |
| |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkArgument; |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkState; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import org.apache.beam.model.jobmanagement.v1.ArtifactApi.Manifest; |
| |
| /** |
| * A location where the results of an {@link LocalFileSystemArtifactStagerService} are stored and |
| * where the retrieval service retrieves them from. |
| */ |
| class LocalArtifactStagingLocation { |
| /** |
| * Create a new {@link LocalArtifactStagingLocation} rooted at the specified location, creating |
| * any directories or subdirectories as necessary. |
| */ |
| public static LocalArtifactStagingLocation createAt(File rootDirectory) { |
| return new LocalArtifactStagingLocation(rootDirectory).createDirectories(); |
| } |
| |
| /** |
| * Create a {@link LocalArtifactStagingLocation} for an existing directory. The directory must |
| * contain a manifest and an artifact directory. |
| */ |
| public static LocalArtifactStagingLocation forExistingDirectory(File rootDirectory) { |
| return new LocalArtifactStagingLocation(rootDirectory).verifyExistence(); |
| } |
| |
| private final File rootDirectory; |
| private final File artifactsDirectory; |
| |
| private LocalArtifactStagingLocation(File base) { |
| this.rootDirectory = base; |
| this.artifactsDirectory = new File(base, "artifacts"); |
| } |
| |
| private LocalArtifactStagingLocation createDirectories() { |
| if (((rootDirectory.exists() && rootDirectory.isDirectory()) || rootDirectory.mkdirs()) |
| && rootDirectory.canWrite()) { |
| checkState( |
| ((artifactsDirectory.exists() && artifactsDirectory.isDirectory()) |
| || artifactsDirectory.mkdir()) |
| && artifactsDirectory.canWrite(), |
| "Could not create artifact staging directory at %s", |
| artifactsDirectory); |
| } else { |
| throw new IllegalStateException( |
| String.format("Could not create staging directory structure at root %s", rootDirectory)); |
| } |
| return this; |
| } |
| |
| private LocalArtifactStagingLocation verifyExistence() { |
| checkArgument(rootDirectory.exists(), "Nonexistent staging location root %s", rootDirectory); |
| checkArgument( |
| rootDirectory.isDirectory(), "Staging location %s is not a directory", rootDirectory); |
| checkArgument( |
| artifactsDirectory.exists(), "Nonexistent artifact directory %s", artifactsDirectory); |
| checkArgument( |
| artifactsDirectory.isDirectory(), |
| "Artifact location %s is not a directory", |
| artifactsDirectory); |
| checkArgument(getManifestFile().exists(), "No Manifest in existing location %s", rootDirectory); |
| return this; |
| } |
| |
| /** |
| * Returns the {@link File} which contains the artifact with the provided name. |
| * |
| * <p>The file may not exist. |
| */ |
| public File getArtifactFile(String artifactName) { |
| return new File(artifactsDirectory, artifactName); |
| } |
| |
| /** |
| * Returns the {@link File} which contains the {@link Manifest}. |
| * |
| * <p>The file may not exist. |
| */ |
| public File getManifestFile() { |
| return new File(rootDirectory, "MANIFEST"); |
| } |
| |
| /** |
| * Returns the local location of this {@link LocalArtifactStagingLocation}. |
| * |
| * <p>This can be used to refer to the staging location when creating a retrieval service. |
| */ |
| public String getRootPath() { |
| try { |
| return rootDirectory.getCanonicalPath(); |
| } catch (IOException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| } |