-
Notifications
You must be signed in to change notification settings - Fork 1.1k
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Split off the "normal case" example from the "legacy case" one. #839
Merged
aozarov
merged 8 commits into
googleapis:gcs-nio
from
jean-philippe-martin:another_nio_example
Apr 5, 2016
Merged
Changes from 1 commit
Commits
Show all changes
8 commits
Select commit
Hold shift + click to select a range
d36c958
Split off the "normal case" example from the "legacy case" one.
jean-philippe-martin 03d6c4d
Correct damage from "helpful" IDE renaming help.
jean-philippe-martin 4d09b7e
Switch gcloud-java-examples to appassembler
jean-philippe-martin 18b7c3d
Rename example to examples and switch a Stat to ListFilesystems
jean-philippe-martin 88b25ac
Clean up pom
jean-philippe-martin e2ab031
Reviewer comments and update_docs_version.sh
jean-philippe-martin 6cc5abc
Added blank line
jean-philippe-martin d48ec9c
Sweating the small stuff
jean-philippe-martin File filter
Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| Example of adding the Google Cloud Storage NIO Provider to a legacy jar | ||
| ======================================================================= | ||
|
|
||
| This project shows how to add GCS capabilities to a jar file for a Java 7 application | ||
| that uses Java NIO but that you cannot recompile. | ||
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong. |
||
|
|
||
| Note that whenever possible, you instead want to recompile the app and use the normal | ||
| dependency mechanism to add a dependency to gcloud-java-nio. You can see examples of | ||
| this in the [gcloud-java-examples](../../gcloud-java-examples) project. | ||
|
|
||
| To run this example: | ||
|
|
||
| 1. Before running the example, go to the [Google Developers Console][developers-console] to ensure that Google Cloud Storage API is enabled and that you have a bucket with a file in it. | ||
|
|
||
| 2. Log in using gcloud SDK (`gcloud auth login` in command line) | ||
|
|
||
| 3. Compile the JAR with: | ||
| ``` | ||
| mvn package -DskipTests -Dmaven.javadoc.skip=true -Dmaven.source.skip=true | ||
| ``` | ||
|
|
||
| 4. Run the sample with: | ||
|
|
||
| ``` | ||
| java -cp gcloud-java-contrib/gcloud-java-nio/target/gcloud-java-nio-0.1.6-SNAPSHOT-shaded.jar:gcloud-java-contrib/gcloud-java-nio-example/target/gcloud-java-nio-example-0.1.6-SNAPSHOT.jar com.google.gcloud.nio.example.Stat --check | ||
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong. |
||
| ``` | ||
| Or, if you have a file in `gs://mybucket/myfile.txt`, you can run: | ||
| ``` | ||
| java -cp gcloud-java-contrib/gcloud-java-nio/target/gcloud-java-nio-0.1.6-SNAPSHOT-shaded.jar:gcloud-java-contrib/gcloud-java-nio-example/target/gcloud-java-nio-example-0.1.6-SNAPSHOT.jar com.google.gcloud.nio.example.Stat gs://mybucket/myfile.txt | ||
| ``` | ||
|
|
||
| The sample doesn't have anything about GCS in it. It gets that ability from the nio jar that | ||
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong. |
||
| we're adding to the classpath. You can use the nio "fat shaded" jar for this purpose as it also | ||
| includes the dependencies for gcloud-java-nio. | ||
|
|
||
| If you have access to a project's source code you can also simply add gcloud-java-nio as | ||
| a dependency and let Maven pull in the required dependencies (this is what the nio unit tests do). | ||
| This approach is preferable as the fat jar approach may waste memory on multiple copies of dependencies. | ||
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| <?xml version="1.0"?> | ||
| <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | ||
| <modelVersion>4.0.0</modelVersion> | ||
| <groupId>com.google.gcloud</groupId> | ||
| <artifactId>gcloud-java-nio-example</artifactId> | ||
| <packaging>jar</packaging> | ||
| <name>GCloud Java NIO example</name> | ||
| <description> | ||
| Demonstrates how to use the gcloud-java-nio jar to add GCS functionality after the fact. | ||
| </description> | ||
| <parent> | ||
| <groupId>com.google.gcloud</groupId> | ||
| <artifactId>gcloud-java-contrib</artifactId> | ||
| <version>0.1.6-SNAPSHOT</version> | ||
| </parent> | ||
| <properties> | ||
| <site.installationModule>nio</site.installationModule> | ||
| </properties> | ||
| <dependencies> | ||
| <dependency> | ||
| <groupId>${project.groupId}</groupId> | ||
| <artifactId>gcloud-java-storage</artifactId> | ||
| <version>${project.version}</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.guava</groupId> | ||
| <artifactId>guava</artifactId> | ||
| <version>19.0</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.code.findbugs</groupId> | ||
| <artifactId>jsr305</artifactId> | ||
| <version>2.0.1</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>javax.inject</groupId> | ||
| <artifactId>javax.inject</artifactId> | ||
| <version>1</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.auto.service</groupId> | ||
| <artifactId>auto-service</artifactId> | ||
| <version>1.0-rc2</version> | ||
| <scope>provided</scope> <!-- to leave out of the all-deps jar --> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.auto.value</groupId> | ||
| <artifactId>auto-value</artifactId> | ||
| <version>1.1</version> | ||
| <scope>provided</scope> <!-- to leave out of the all-deps jar --> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>junit</groupId> | ||
| <artifactId>junit</artifactId> | ||
| <version>4.12</version> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.guava</groupId> | ||
| <artifactId>guava-testlib</artifactId> | ||
| <version>19.0</version> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.truth</groupId> | ||
| <artifactId>truth</artifactId> | ||
| <version>0.27</version> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.mockito</groupId> | ||
| <artifactId>mockito-core</artifactId> | ||
| <version>1.9.5</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.apache.maven.plugins</groupId> | ||
| <artifactId>maven-assembly-plugin</artifactId> | ||
| <version>2.5.4</version> | ||
| </dependency> | ||
| </dependencies> | ||
| <build> | ||
| <plugins> | ||
| <plugin> | ||
| <groupId>org.codehaus.mojo</groupId> | ||
| <artifactId>exec-maven-plugin</artifactId> | ||
| <configuration> | ||
| <skip>false</skip> | ||
| </configuration> | ||
| </plugin> | ||
| </plugins> | ||
| </build> | ||
| </project> |
108 changes: 108 additions & 0 deletions
108
...ava-contrib/gcloud-java-nio-example/src/main/java/com/google/gcloud/nio/example/Stat.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package com.google.gcloud.nio.example; | ||
|
|
||
| import java.io.IOException; | ||
| import java.net.URI; | ||
| import java.nio.file.FileSystem; | ||
| import java.nio.file.FileSystems; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.Paths; | ||
| import java.nio.file.spi.FileSystemProvider; | ||
|
|
||
| /** | ||
| * Stat is a super-simple program that just displays the size of the file | ||
| * passed as argument. | ||
| * | ||
| * <p>It's meant to be used to test GCloud's integration with Java NIO. | ||
| * | ||
| * <p>You can either use the '--check' argument to see whether GCS is enabled, | ||
| * or you can directly pass in a GCS file name to use. In that case you have to | ||
| * be logged in (using e.g. the gcloud auth command). | ||
| * | ||
| * <p>See the README for a command line to run this example. | ||
| * | ||
| * <p>In short, This version (in gcloud-java-nio-example) is in a package that does not list | ||
| * gcloud-java-nio as a dependency, so you have to add the gcloud-java-nio jar to the classpath. | ||
|
|
||
| */ | ||
| public class Stat { | ||
|
|
||
| /** | ||
| * See the class documentation. | ||
| */ | ||
| public static void main(String[] args) throws IOException { | ||
| if (args.length == 0 || args[0].equals("--help")) { | ||
| help(); | ||
| return; | ||
| } | ||
| if (args[0].equals("--list")) { | ||
| listFilesystems(); | ||
| return; | ||
| } | ||
| if (args[0].equals("--check")) { | ||
| checkGcs(); | ||
| return; | ||
| } | ||
| for (String a : args) { | ||
| statFile(a); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Print the length of the indicated file. | ||
| * | ||
| * <p>This uses the normal Java NIO Api, so it can take advantage of any installed | ||
| * NIO Filesystem provider without any extra effort. | ||
| */ | ||
| private static void statFile(String fname) { | ||
| try { | ||
| Path path = Paths.get(new URI(fname)); | ||
| long size = Files.size(path); | ||
| System.out.println(fname + ": " + size + " bytes."); | ||
| } catch (Exception ex) { | ||
| System.out.println(fname + ": " + ex.toString()); | ||
| } | ||
| } | ||
|
|
||
| private static void help() { | ||
| String[] help = | ||
| {"The arguments can be one of:", | ||
| " * <path>", | ||
| " to display the length of that file.", | ||
| "", | ||
| " * --list", | ||
| " to list the filesystem providers.", | ||
| "", | ||
| " * --check", | ||
| " to double-check the GCS provider is installed.", | ||
| "", | ||
| "The purpose of this tool is to demonstrate that the gcloud NIO filesystem provider", | ||
| "can add Google Cloud Storage support to programs not explicitly designed for it.", | ||
| "", | ||
| "This tool normally knows nothing of Google Cloud Storage. If you pass it --check", | ||
| "or a GCS file name (e.g. gs://mybucket/myfile), it will show an error.", | ||
| "However, by just adding the gcloud-nio jar in your classpath, this tool is made", | ||
| "aware of gs:// paths and can access files on the cloud.", | ||
| "", | ||
| "The gcloud NIO filesystem provider can similarly enable existing Java 7 programs", | ||
| "to read and write cloud files, even if they have no special built-in cloud support." | ||
| }; | ||
| for (String s : help) { | ||
| System.out.println(s); | ||
| } | ||
| } | ||
|
|
||
| private static void listFilesystems() { | ||
| System.out.println("Installed filesystem providers:"); | ||
| for (FileSystemProvider p : FileSystemProvider.installedProviders()) { | ||
| System.out.println(" " + p.getScheme()); | ||
| } | ||
| } | ||
|
|
||
| private static void checkGcs() { | ||
| FileSystem fs = FileSystems.getFileSystem(URI.create("gs://domain-registry-alpha")); | ||
| System.out.println("Success! We can instantiate a gs:// filesystem."); | ||
| System.out.println("isOpen: " + fs.isOpen()); | ||
| System.out.println("isReadOnly: " + fs.isReadOnly()); | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong.
This comment was marked as spam.
Sorry, something went wrong.