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HDFS-7656. Expose truncate API for HDFS httpfs. (yliu)

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This commit is contained in:
yliu 2015-02-19 08:36:31 +08:00
parent 64a8375635
commit 2fd02afeca
6 changed files with 133 additions and 6 deletions
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24
hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/client/HttpFSFileSystem.java
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@ -109,12 +109,15 @@ public class HttpFSFileSystem extends FileSystem
public static final String XATTR_VALUE_PARAM = "xattr.value";
public static final String XATTR_SET_FLAG_PARAM = "flag";
public static final String XATTR_ENCODING_PARAM = "encoding";
public static final String NEW_LENGTH_PARAM = "newlength";
public static final Short DEFAULT_PERMISSION = 0755;
public static final String ACLSPEC_DEFAULT = "";
public static final String RENAME_JSON = "boolean";
public static final String TRUNCATE_JSON = "boolean";
public static final String DELETE_JSON = "boolean";
public static final String MKDIRS_JSON = "boolean";
@ -191,7 +194,7 @@ public static enum Operation {
GETHOMEDIRECTORY(HTTP_GET), GETCONTENTSUMMARY(HTTP_GET),
GETFILECHECKSUM(HTTP_GET), GETFILEBLOCKLOCATIONS(HTTP_GET),
INSTRUMENTATION(HTTP_GET), GETACLSTATUS(HTTP_GET),
APPEND(HTTP_POST), CONCAT(HTTP_POST),
APPEND(HTTP_POST), CONCAT(HTTP_POST), TRUNCATE(HTTP_POST),
CREATE(HTTP_PUT), MKDIRS(HTTP_PUT), RENAME(HTTP_PUT), SETOWNER(HTTP_PUT),
SETPERMISSION(HTTP_PUT), SETREPLICATION(HTTP_PUT), SETTIMES(HTTP_PUT),
MODIFYACLENTRIES(HTTP_PUT), REMOVEACLENTRIES(HTTP_PUT),
@ -567,6 +570,25 @@ public FSDataOutputStream append(Path f, int bufferSize,
HttpURLConnection.HTTP_OK);
}
/**
* Truncate a file.
*
* @param f the file to be truncated.
* @param newLength The size the file is to be truncated to.
*
* @throws IOException
*/
@Override
public boolean truncate(Path f, long newLength) throws IOException {
Map<String, String> params = new HashMap<String, String>();
params.put(OP_PARAM, Operation.TRUNCATE.toString());
params.put(NEW_LENGTH_PARAM, Long.toString(newLength));
HttpURLConnection conn = getConnection(Operation.TRUNCATE.getMethod(),
params, f, true);
JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn);
return (Boolean) json.get(TRUNCATE_JSON);
}
/**
* Concat existing files together.
* @param f the path to the target destination.

43
hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/server/FSOperations.java
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@ -364,7 +364,7 @@ public Void execute(FileSystem fs) throws IOException {
}
/**
* Executor that performs an append FileSystemAccess files system operation.
* Executor that performs a concat FileSystemAccess files system operation.
*/
@InterfaceAudience.Private
public static class FSConcat implements FileSystemAccess.FileSystemExecutor<Void> {
@ -404,6 +404,47 @@ public Void execute(FileSystem fs) throws IOException {
}
/**
* Executor that performs a truncate FileSystemAccess files system operation.
*/
@InterfaceAudience.Private
public static class FSTruncate implements
FileSystemAccess.FileSystemExecutor<JSONObject> {
private Path path;
private long newLength;
/**
* Creates a Truncate executor.
*
* @param path target path to truncate to.
* @param newLength The size the file is to be truncated to.
*/
public FSTruncate(String path, long newLength) {
this.path = new Path(path);
this.newLength = newLength;
}
/**
* Executes the filesystem operation.
*
* @param fs filesystem instance to use.
*
* @return <code>true</code> if the file has been truncated to the desired,
* <code>false</code> if a background process of adjusting the
* length of the last block has been started, and clients should
* wait for it to complete before proceeding with further file
* updates.
*
* @throws IOException thrown if an IO error occured.
*/
@Override
public JSONObject execute(FileSystem fs) throws IOException {
boolean result = fs.truncate(path, newLength);
return toJSON(HttpFSFileSystem.TRUNCATE_JSON.toLowerCase(), result);
}
}
/**
* Executor that performs a content-summary FileSystemAccess files system operation.
*/

20
hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/server/HttpFSParametersProvider.java
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@ -63,6 +63,7 @@ public class HttpFSParametersProvider extends ParametersProvider {
PARAMS_DEF.put(Operation.INSTRUMENTATION, new Class[]{});
PARAMS_DEF.put(Operation.APPEND, new Class[]{DataParam.class});
PARAMS_DEF.put(Operation.CONCAT, new Class[]{SourcesParam.class});
PARAMS_DEF.put(Operation.TRUNCATE, new Class[]{NewLengthParam.class});
PARAMS_DEF.put(Operation.CREATE,
new Class[]{PermissionParam.class, OverwriteParam.class,
ReplicationParam.class, BlockSizeParam.class, DataParam.class});
@ -289,6 +290,25 @@ public OffsetParam() {
}
}
/**
* Class for newlength parameter.
*/
@InterfaceAudience.Private
public static class NewLengthParam extends LongParam {
/**
* Parameter name.
*/
public static final String NAME = HttpFSFileSystem.NEW_LENGTH_PARAM;
/**
* Constructor.
*/
public NewLengthParam() {
super(NAME, 0l);
}
}
/**
* Class for overwrite parameter.
*/

10
hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/server/HttpFSServer.java
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@ -33,6 +33,7 @@
import org.apache.hadoop.fs.http.server.HttpFSParametersProvider.GroupParam;
import org.apache.hadoop.fs.http.server.HttpFSParametersProvider.LenParam;
import org.apache.hadoop.fs.http.server.HttpFSParametersProvider.ModifiedTimeParam;
import org.apache.hadoop.fs.http.server.HttpFSParametersProvider.NewLengthParam;
import org.apache.hadoop.fs.http.server.HttpFSParametersProvider.OffsetParam;
import org.apache.hadoop.fs.http.server.HttpFSParametersProvider.OperationParam;
import org.apache.hadoop.fs.http.server.HttpFSParametersProvider.OverwriteParam;
@ -427,6 +428,15 @@ public Response post(InputStream is,
response = Response.ok().build();
break;
}
case TRUNCATE: {
Long newLength = params.get(NewLengthParam.NAME, NewLengthParam.class);
FSOperations.FSTruncate command =
new FSOperations.FSTruncate(path, newLength);
JSONObject json = fsExecute(user, command);
AUDIT_LOG.info("Truncate [{}] to length [{}]", path, newLength);
response = Response.ok(json).type(MediaType.APPLICATION_JSON).build();
break;
}
default: {
throw new IOException(
MessageFormat.format("Invalid HTTP POST operation [{0}]",

40
hadoop-hdfs-project/hadoop-hdfs-httpfs/src/test/java/org/apache/hadoop/fs/http/client/BaseTestHttpFSWith.java
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@ -24,12 +24,14 @@
import org.apache.hadoop.fs.FileChecksum;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileSystemTestHelper;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.http.server.HttpFSServerWebApp;
import org.apache.hadoop.fs.permission.AclEntry;
import org.apache.hadoop.fs.permission.AclStatus;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.AppendTestUtil;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.security.UserGroupInformation;
@ -192,7 +194,7 @@ private void testCreate() throws Exception {
Assert.fail("the create should have failed because the file exists " +
"and override is FALSE");
} catch (IOException ex) {
System.out.println("#");
System.out.println("#");
} catch (Exception ex) {
Assert.fail(ex.toString());
}
@ -222,6 +224,31 @@ private void testAppend() throws Exception {
}
}
private void testTruncate() throws Exception {
if (!isLocalFS()) {
final short repl = 3;
final int blockSize = 1024;
final int numOfBlocks = 2;
FileSystem fs = FileSystem.get(getProxiedFSConf());
fs.mkdirs(getProxiedFSTestDir());
Path file = new Path(getProxiedFSTestDir(), "foo.txt");
final byte[] data = FileSystemTestHelper.getFileData(
numOfBlocks, blockSize);
FileSystemTestHelper.createFile(fs, file, data, blockSize, repl);
final int newLength = blockSize;
boolean isReady = fs.truncate(file, newLength);
Assert.assertTrue("Recovery is not expected.", isReady);
FileStatus fileStatus = fs.getFileStatus(file);
Assert.assertEquals(fileStatus.getLen(), newLength);
AppendTestUtil.checkFullFile(fs, file, newLength, data, file.toString());
fs.close();
}
}
private void testConcat() throws Exception {
Configuration config = getProxiedFSConf();
config.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 1024);
@ -784,9 +811,10 @@ private void testDirAcls() throws Exception {
}
protected enum Operation {
GET, OPEN, CREATE, APPEND, CONCAT, RENAME, DELETE, LIST_STATUS, WORKING_DIRECTORY, MKDIRS,
SET_TIMES, SET_PERMISSION, SET_OWNER, SET_REPLICATION, CHECKSUM, CONTENT_SUMMARY,
FILEACLS, DIRACLS, SET_XATTR, GET_XATTRS, REMOVE_XATTR, LIST_XATTRS
GET, OPEN, CREATE, APPEND, TRUNCATE, CONCAT, RENAME, DELETE, LIST_STATUS,
WORKING_DIRECTORY, MKDIRS, SET_TIMES, SET_PERMISSION, SET_OWNER,
SET_REPLICATION, CHECKSUM, CONTENT_SUMMARY, FILEACLS, DIRACLS, SET_XATTR,
GET_XATTRS, REMOVE_XATTR, LIST_XATTRS
}
private void operation(Operation op) throws Exception {
@ -803,8 +831,12 @@ private void operation(Operation op) throws Exception {
case APPEND:
testAppend();
break;
case TRUNCATE:
testTruncate();
break;
case CONCAT:
testConcat();
break;
case RENAME:
testRename();
break;

2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -337,6 +337,8 @@ Release 2.7.0 - UNRELEASED
HDFS-7584. Enable Quota Support for Storage Types (See breakdown of
tasks below)
HDFS-7656. Expose truncate API for HDFS httpfs. (yliu)
IMPROVEMENTS
HDFS-7055. Add tracing to DFSInputStream (cmccabe)