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f4be3bb9
编写于
6月 08, 2017
作者:
D
dongeforever
提交者:
dongeforever
6月 22, 2017
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差异文件
[ROCKETMQ-219] Add batch example, closes apache/incubator-rocketmq#112
上级
605103ef
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2 changed file
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example/src/main/java/org/apache/rocketmq/example/batch/SimpleBatchProducer.java
...rg/apache/rocketmq/example/batch/SimpleBatchProducer.java
+42
-0
example/src/main/java/org/apache/rocketmq/example/batch/SplitBatchProducer.java
...org/apache/rocketmq/example/batch/SplitBatchProducer.java
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example/src/main/java/org/apache/rocketmq/example/batch/SimpleBatchProducer.java
0 → 100644
浏览文件 @
f4be3bb9
/*
* 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.rocketmq.example.batch
;
import
java.util.ArrayList
;
import
java.util.List
;
import
org.apache.rocketmq.client.producer.DefaultMQProducer
;
import
org.apache.rocketmq.common.message.Message
;
public
class
SimpleBatchProducer
{
public
static
void
main
(
String
[]
args
)
throws
Exception
{
DefaultMQProducer
producer
=
new
DefaultMQProducer
(
"BatchProducerGroupName"
);
producer
.
start
();
//If you just send messages of no more than 1MiB at a time, it is easy to use batch
//Messages of the same batch should have: same topic, same waitStoreMsgOK and no schedule support
String
topic
=
"BatchTest"
;
List
<
Message
>
messages
=
new
ArrayList
<>();
messages
.
add
(
new
Message
(
topic
,
"Tag"
,
"OrderID001"
,
"Hello world 0"
.
getBytes
()));
messages
.
add
(
new
Message
(
topic
,
"Tag"
,
"OrderID002"
,
"Hello world 1"
.
getBytes
()));
messages
.
add
(
new
Message
(
topic
,
"Tag"
,
"OrderID003"
,
"Hello world 2"
.
getBytes
()));
producer
.
send
(
messages
);
}
}
example/src/main/java/org/apache/rocketmq/example/batch/SplitBatchProducer.java
0 → 100644
浏览文件 @
f4be3bb9
/*
* 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.rocketmq.example.batch
;
import
java.util.ArrayList
;
import
java.util.Iterator
;
import
java.util.List
;
import
java.util.Map
;
import
org.apache.rocketmq.client.producer.DefaultMQProducer
;
import
org.apache.rocketmq.common.message.Message
;
public
class
SplitBatchProducer
{
public
static
void
main
(
String
[]
args
)
throws
Exception
{
DefaultMQProducer
producer
=
new
DefaultMQProducer
(
"BatchProducerGroupName"
);
producer
.
start
();
//large batch
String
topic
=
"BatchTest"
;
List
<
Message
>
messages
=
new
ArrayList
<>(
100
*
1000
);
for
(
int
i
=
0
;
i
<
100
*
1000
;
i
++)
{
messages
.
add
(
new
Message
(
topic
,
"Tag"
,
"OrderID"
+
i
,
(
"Hello world "
+
i
).
getBytes
()));
}
//split the large batch into small ones:
ListSplitter
splitter
=
new
ListSplitter
(
messages
);
while
(
splitter
.
hasNext
())
{
List
<
Message
>
listItem
=
splitter
.
next
();
producer
.
send
(
listItem
);
}
}
}
class
ListSplitter
implements
Iterator
<
List
<
Message
>>
{
private
int
sizeLimit
=
1000
*
1000
;
private
final
List
<
Message
>
messages
;
private
int
currIndex
;
public
ListSplitter
(
List
<
Message
>
messages
)
{
this
.
messages
=
messages
;
}
@Override
public
boolean
hasNext
()
{
return
currIndex
<
messages
.
size
();
}
@Override
public
List
<
Message
>
next
()
{
int
nextIndex
=
currIndex
;
int
totalSize
=
0
;
for
(;
nextIndex
<
messages
.
size
();
nextIndex
++)
{
Message
message
=
messages
.
get
(
nextIndex
);
int
tmpSize
=
message
.
getTopic
().
length
()
+
message
.
getBody
().
length
;
Map
<
String
,
String
>
properties
=
message
.
getProperties
();
for
(
Map
.
Entry
<
String
,
String
>
entry
:
properties
.
entrySet
())
{
tmpSize
+=
entry
.
getKey
().
length
()
+
entry
.
getValue
().
length
();
}
tmpSize
=
tmpSize
+
20
;
//for log overhead
if
(
tmpSize
>
sizeLimit
)
{
//it is unexpected that single message exceeds the sizeLimit
//here just let it go, otherwise it will block the splitting process
if
(
nextIndex
-
currIndex
==
0
)
{
//if the next sublist has no element, add this one and then break, otherwise just break
nextIndex
++;
}
break
;
}
if
(
tmpSize
+
totalSize
>
sizeLimit
)
{
break
;
}
else
{
totalSize
+=
tmpSize
;
}
}
List
<
Message
>
subList
=
messages
.
subList
(
currIndex
,
nextIndex
);
currIndex
=
nextIndex
;
return
subList
;
}
@Override
public
void
remove
()
{
throw
new
UnsupportedOperationException
(
"Not allowed to remove"
);
}
}
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