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https://issues.apache.org/jira/browse/BEAM-9577?focusedWorklogId=433399&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-433399
]
ASF GitHub Bot logged work on BEAM-9577:
----------------------------------------
Author: ASF GitHub Bot
Created on: 14/May/20 22:19
Start Date: 14/May/20 22:19
Worklog Time Spent: 10m
Work Description: robertwb commented on a change in pull request #11708:
URL: https://github.com/apache/beam/pull/11708#discussion_r425462830
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/io/ClassLoaderFileSystem.java
##########
@@ -0,0 +1,154 @@
+/*
+ * 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.sdk.io;
+
+import static
org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument;
+
+import com.google.auto.service.AutoService;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.channels.Channels;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
+import java.util.Collection;
+import java.util.List;
+import javax.annotation.Nullable;
+import org.apache.beam.sdk.annotations.Experimental;
+import org.apache.beam.sdk.io.fs.CreateOptions;
+import org.apache.beam.sdk.io.fs.MatchResult;
+import org.apache.beam.sdk.io.fs.ResolveOptions;
+import org.apache.beam.sdk.io.fs.ResourceId;
+import org.apache.beam.sdk.options.PipelineOptions;
+import
org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableList;
+
+/** A read-only {@link FileSystem} implementation looking up resources using a
ClassLoader. */
+public class ClassLoaderFileSystem extends
FileSystem<ClassLoaderFileSystem.ClassLoaderResourceId> {
+
+ public static final String SCHEMA = "classpath";
+ private static final String PREFIX = SCHEMA + "://";
+
+ ClassLoaderFileSystem() {}
+
+ @Override
+ protected List<MatchResult> match(List<String> specs) throws IOException {
+ throw new UnsupportedOperationException("Un-globable filesystem.");
+ }
+
+ @Override
+ protected WritableByteChannel create(
+ ClassLoaderResourceId resourceId, CreateOptions createOptions) throws
IOException {
+ throw new UnsupportedOperationException("Read-only filesystem.");
+ }
+
+ @Override
+ protected ReadableByteChannel open(ClassLoaderResourceId resourceId) throws
IOException {
+ ClassLoader classLoader = getClass().getClassLoader();
+ InputStream inputStream =
+
classLoader.getResourceAsStream(resourceId.path.substring(PREFIX.length()));
+ if (inputStream == null) {
+ throw new IOException("Unable to load " + resourceId.path + " with " +
classLoader);
+ }
+ return Channels.newChannel(inputStream);
+ }
+
+ @Override
+ protected void copy(
+ List<ClassLoaderResourceId> srcResourceIds, List<ClassLoaderResourceId>
destResourceIds)
+ throws IOException {
+ throw new UnsupportedOperationException("Read-only filesystem.");
+ }
+
+ @Override
+ protected void rename(
+ List<ClassLoaderResourceId> srcResourceIds, List<ClassLoaderResourceId>
destResourceIds)
+ throws IOException {
+ throw new UnsupportedOperationException("Read-only filesystem.");
+ }
+
+ @Override
+ protected void delete(Collection<ClassLoaderResourceId> resourceIds) throws
IOException {
+ throw new UnsupportedOperationException("Read-only filesystem.");
+ }
+
+ @Override
+ protected ClassLoaderResourceId matchNewResource(String path, boolean
isDirectory) {
+ return new ClassLoaderResourceId(path);
+ }
+
+ @Override
+ protected String getScheme() {
+ return SCHEMA;
+ }
+
+ public static class ClassLoaderResourceId implements ResourceId {
+
+ private final String path;
+
+ private ClassLoaderResourceId(String path) {
+ checkArgument(path.startsWith(PREFIX), path);
+ this.path = path;
+ }
+
+ @Override
+ public ResourceId resolve(String other, ResolveOptions resolveOptions) {
Review comment:
The documentation is in the super classes, but I added a test.
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Issue Time Tracking
-------------------
Worklog Id: (was: 433399)
Time Spent: 21h 40m (was: 21.5h)
> Update artifact staging and retrieval protocols to be dependency aware.
> -----------------------------------------------------------------------
>
> Key: BEAM-9577
> URL: https://issues.apache.org/jira/browse/BEAM-9577
> Project: Beam
> Issue Type: Improvement
> Components: beam-model
> Reporter: Robert Bradshaw
> Assignee: Robert Bradshaw
> Priority: Major
> Time Spent: 21h 40m
> Remaining Estimate: 0h
>
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