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体验新版 GitCode,发现更多精彩内容 >>
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66e0a271
编写于
6月 29, 2018
作者:
S
Stephan Ewen
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电子邮件补丁
差异文件
[hotfix] [core] Remove unused class AbstractMultiFSDataInputStream
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f2475989
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1
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1 changed file
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0 addition
and
115 deletion
+0
-115
flink-core/src/main/java/org/apache/flink/core/fs/AbstractMultiFSDataInputStream.java
.../apache/flink/core/fs/AbstractMultiFSDataInputStream.java
+0
-115
未找到文件。
flink-core/src/main/java/org/apache/flink/core/fs/AbstractMultiFSDataInputStream.java
已删除
100644 → 0
浏览文件 @
f2475989
/*
* 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.flink.core.fs
;
import
org.apache.flink.annotation.Internal
;
import
org.apache.flink.util.IOUtils
;
import
org.apache.flink.util.Preconditions
;
import
java.io.EOFException
;
import
java.io.IOException
;
/**
* Abstract base class for wrappers over multiple {@link FSDataInputStream}, which gives a contiguous view on all inner
* streams and makes them look like a single stream, in which we can read, seek, etc.
*/
@Internal
public
abstract
class
AbstractMultiFSDataInputStream
extends
FSDataInputStream
{
/** Inner stream for the currently accessed segment of the virtual global stream. */
protected
FSDataInputStream
delegate
;
/** Position in the virtual global stream. */
protected
long
totalPos
;
/** Total available bytes in the virtual global stream. */
protected
long
totalAvailable
;
public
AbstractMultiFSDataInputStream
()
{
this
.
totalPos
=
0L
;
}
@Override
public
void
seek
(
long
desired
)
throws
IOException
{
if
(
desired
==
totalPos
)
{
return
;
}
Preconditions
.
checkArgument
(
desired
>=
0L
);
if
(
desired
>
totalAvailable
)
{
throw
new
EOFException
();
}
IOUtils
.
closeQuietly
(
delegate
);
delegate
=
getSeekedStreamForOffset
(
desired
);
this
.
totalPos
=
desired
;
}
@Override
public
long
getPos
()
throws
IOException
{
return
totalPos
;
}
@Override
public
int
read
()
throws
IOException
{
if
(
null
==
delegate
)
{
return
-
1
;
}
int
val
=
delegate
.
read
();
if
(-
1
==
val
)
{
IOUtils
.
closeQuietly
(
delegate
);
if
(
totalPos
<
totalAvailable
)
{
delegate
=
getSeekedStreamForOffset
(
totalPos
);
}
else
{
delegate
=
null
;
}
return
read
();
}
++
totalPos
;
return
val
;
}
@Override
public
void
close
()
throws
IOException
{
IOUtils
.
closeQuietly
(
delegate
);
}
@Override
public
long
skip
(
long
n
)
throws
IOException
{
seek
(
totalPos
+
n
);
return
n
;
}
/**
* Delivers a the right stream for the given global stream offset. The returned stream is already seeked to the
* right local offset that correctly reflects the global offset.
*
* @param globalStreamOffset the global offset to which we seek
* @return a sub-stream, seeked to the correct local offset w.r.t. the global offset.
* @throws IOException
*/
protected
abstract
FSDataInputStream
getSeekedStreamForOffset
(
long
globalStreamOffset
)
throws
IOException
;
}
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