Implement bare-bones blob listing #884

jean-philippe-martin · 2016-04-08T23:13:46Z

Update FakeStorageRPC to (barely) implement list(bucket).
Wire the NIO provider to take advantage of it so we can list the contents of folders.
Add the corresponding test case.

I notice my IDE helpfully changed some of the files: it added an explicit java version (I'm using 1.8 features, hopefully that's OK?), and it added some wildcard imports.

Let me know which of those (if any) I should revert!

Also I'm not entirely sure of the contract that list(String bucket, Map<Option, ?> options) is supposed to follow, beyond "Lists the bucket's blobs". I filled it in with my best guess but if there's a spec somewhere for me to follow, pointers would be appreciated!

jean-philippe-martin · 2016-04-08T23:55:08Z

OK, looks like Java 8 is a no-go, I'll change things to the old way.

jean-philippe-martin · 2016-04-12T19:03:55Z

Changed to Java 1.7, PTAL.

...-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java

+        return ret.iterator();
+      }
+      @Override
+      public void close() throws IOException {


jean-philippe-martin · 2016-04-13T18:28:33Z

This should address all the comments so far.

...-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java

@@ -79,6 +82,34 @@
 @AutoService(FileSystemProvider.class)
 public final class CloudStorageFileSystemProvider extends FileSystemProvider {

+  private static class LazyPathIterator extends AbstractIterator<Path> {
+    private Iterator<Blob> blobIterator;


jean-philippe-martin · 2016-04-13T21:31:33Z

mmh, the extra line is still there even though I thought I deleted it. Let me try to delete more and see what happens. Alternatively, we could decide we're OK with two blank lines at the end of a file.

jean-philippe-martin · 2016-04-13T21:39:24Z

The mystery deepens. On my disk there clearly is only a single newline at the end (which is what you want to see), and git believes that my files match what's been pushed.

gcloud-java$ xxd gcloud-java-contrib/gcloud-java-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java  | tail -n 4
00005960: 7265 7475 726e 206e 6577 2049 4f45 7863  return new IOExc
00005970: 6570 7469 6f6e 286f 6f70 732e 6765 744d  eption(oops.getM
00005980: 6573 7361 6765 2829 2c20 6f6f 7073 293b  essage(), oops);
00005990: 0a20 207d 0a7d 0a                        .  }.}.
gcloud-java$ git diff
gcloud-java$ git commit
nothing added to commit but untracked files present

jean-philippe-martin · 2016-04-13T21:40:21Z

We can come back to this later.

...-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java

+    }
+  }
+
+
  private final Storage storage;


...-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java

+
+      // Does nothing since there's nothing to close. Commenting this method to quiet codacy.
+      @Override
+      public void close() throws IOException {


mziccard · 2016-04-14T14:26:11Z

The mystery deepens. On my disk there clearly is only a single newline at the end (which is what you want to see), and git believes that my files match what's been pushed.

I cloned your branch and I can see the 2 empty lines. If I remove one git diff shows:

--- a/gcloud-java-contrib/gcloud-java-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java
+++ b/gcloud-java-contrib/gcloud-java-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java
@@ -109,7 +109,6 @@ public final class CloudStorageFileSystemProvider extends FileSystemProvider {
     }
   }

-
   private final Storage storage;

   // used only when we create a new instance of CloudStorageFileSystemProvider.

gcloud-java-storage/src/main/java/com/google/gcloud/storage/testing/FakeStorageRpc.java

-    return null;
+    String preprefix = "";
+    for (Map.Entry<Option, ?> e : options.entrySet()) {
+      switch (e.getKey()) {


jean-philippe-martin · 2016-04-14T17:46:37Z

I don't know what to say. Does git lie to us when it says that my branch's up-to-date? It looks like what's on my machine isn't the same as what's on the server. I'm going to push with the other fixes, let's see if after that the state on my machine matches the state on the server.

jean-philippe-martin · 2016-04-14T17:55:34Z

FWIW, when I look at the file on GitHub's viewer, it shows no empty line at all at the end of the file, so line 637 is the last line. When I look at it in my IDE it shows one more line (638), empty.

The hex dump still shows a single 0x0a at the end of the file. The diff for this commit indicates no change to this last line, nor does the previous one. Yet we seem to be seeing something different.

When you clone my branch, and before you open the file in any editor, what does the hex dump show?

mziccard · 2016-04-14T18:21:03Z

The extra line seems to be gone now, am I wrong?

This looks good to me feel free to merge after squashing the commits.

jean-philippe-martin · 2016-04-14T20:25:38Z

Squashed. Can we agree not to worry about extra blank lines next time?

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…ator_java versions (#884) - [ ] Regenerate this pull request now. PiperOrigin-RevId: 472750037 Source-Link: googleapis/googleapis@88f2ea3 Source-Link: https://github.com/googleapis/googleapis-gen/commit/230a5588306aae18fe8f2a57f14d4039ad72c901 Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMjMwYTU1ODgzMDZhYWUxOGZlOGYyYTU3ZjE0ZDQwMzlhZDcyYzkwMSJ9

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...-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java

return ret.iterator();

}

@Override

public void close() throws IOException {

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...-nio/src/main/java/com/google/gcloud/storage/contrib/nio/CloudStorageFileSystemProvider.java

}

}

private final Storage storage;

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gcloud-java-storage/src/main/java/com/google/gcloud/storage/testing/FakeStorageRpc.java

return null;

String preprefix = "";

for (Map.Entry<Option, ?> e : options.entrySet()) {

switch (e.getKey()) {

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Implement bare-bones blob listing

9c9dc0d

jean-philippe-martin force-pushed the fake_list branch from fc0af69 to 9c9dc0d Compare April 14, 2016 20:25

jean-philippe-martin merged commit 9a8c51a into googleapis:gcs-nio Apr 14, 2016

jean-philippe-martin deleted the fake_list branch April 14, 2016 21:06

mziccard mentioned this pull request Apr 15, 2016

NIO: Implement directory listing #813

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Implement bare-bones blob listing #884

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Implement bare-bones blob listing #884

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