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体验新版 GitCode,发现更多精彩内容 >>
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52d378d4
编写于
7月 02, 2013
作者:
P
Phillip Webb
提交者:
Rossen Stoyanchev
7月 03, 2013
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Add PublishSubscribeChannel
Add a PublishSubscribeChannel implementation of SubscribableChannel.
上级
7a85827c
变更
2
隐藏空白更改
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2 changed file
with
241 addition
and
0 deletion
+241
-0
spring-context/src/main/java/org/springframework/messaging/PublishSubscribeChannel.java
...rg/springframework/messaging/PublishSubscribeChannel.java
+97
-0
spring-context/src/test/java/org/springframework/messaging/PublishSubscibeChannelTests.java
...pringframework/messaging/PublishSubscibeChannelTests.java
+144
-0
未找到文件。
spring-context/src/main/java/org/springframework/messaging/PublishSubscribeChannel.java
0 → 100644
浏览文件 @
52d378d4
/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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.springframework.messaging
;
import
java.util.Set
;
import
java.util.concurrent.CopyOnWriteArraySet
;
import
java.util.concurrent.Executor
;
import
org.springframework.util.Assert
;
/**
* A {@link SubscribableChannel} that sends messages to each of its subscribers. For a
* more feature complete implementation consider
* {@code org.springframework.integration.channel.PublishSubscribeChannel} from the
* Spring Integration project.
*
* @author Phillip Webb
*/
public
class
PublishSubscribeChannel
implements
SubscribableChannel
{
private
Executor
executor
;
private
Set
<
MessageHandler
>
handlers
=
new
CopyOnWriteArraySet
<
MessageHandler
>();
/**
* Create a new {@link PublishSubscribeChannel} instance where messages will be sent
* in the callers thread.
*/
public
PublishSubscribeChannel
()
{
this
(
null
);
}
/**
* Create a new {@link PublishSubscribeChannel} instance where messages will be sent
* via the specified executor.
* @param executor the executor used to send the message or {@code null} to execute in
* the callers thread.
*/
public
PublishSubscribeChannel
(
Executor
executor
)
{
this
.
executor
=
executor
;
}
@Override
public
boolean
send
(
Message
<?>
message
)
{
return
send
(
message
,
INDEFINITE_TIMEOUT
);
}
@Override
public
boolean
send
(
Message
<?>
message
,
long
timeout
)
{
Assert
.
notNull
(
message
,
"Message must not be null"
);
Assert
.
notNull
(
message
.
getPayload
(),
"Message payload must not be null"
);
for
(
final
MessageHandler
handler
:
this
.
handlers
)
{
dispatchToHandler
(
message
,
handler
);
}
return
true
;
}
private
void
dispatchToHandler
(
final
Message
<?>
message
,
final
MessageHandler
handler
)
{
if
(
this
.
executor
==
null
)
{
handler
.
handleMessage
(
message
);
}
else
{
this
.
executor
.
execute
(
new
Runnable
()
{
@Override
public
void
run
()
{
handler
.
handleMessage
(
message
);
}
});
}
}
@Override
public
boolean
subscribe
(
MessageHandler
handler
)
{
return
this
.
handlers
.
add
(
handler
);
}
@Override
public
boolean
unsubscribe
(
MessageHandler
handler
)
{
return
this
.
handlers
.
remove
(
handler
);
}
}
spring-context/src/test/java/org/springframework/messaging/PublishSubscibeChannelTests.java
0 → 100644
浏览文件 @
52d378d4
/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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.springframework.messaging
;
import
java.util.concurrent.Executor
;
import
org.junit.Before
;
import
org.junit.Rule
;
import
org.junit.Test
;
import
org.junit.rules.ExpectedException
;
import
org.mockito.ArgumentCaptor
;
import
org.mockito.Captor
;
import
org.mockito.Mock
;
import
org.mockito.MockitoAnnotations
;
import
org.springframework.messaging.support.MessageBuilder
;
import
static
org
.
hamcrest
.
Matchers
.*;
import
static
org
.
junit
.
Assert
.*;
import
static
org
.
mockito
.
BDDMockito
.*;
/**
* Tests for {@link PublishSubscribeChannel}.
*
* @author Phillip Webb
*/
public
class
PublishSubscibeChannelTests
{
@Rule
public
ExpectedException
thrown
=
ExpectedException
.
none
();
private
PublishSubscribeChannel
channel
=
new
PublishSubscribeChannel
();
@Mock
private
MessageHandler
handler
;
private
final
Object
payload
=
new
Object
();
private
final
Message
<
Object
>
message
=
MessageBuilder
.
withPayload
(
this
.
payload
).
build
();
@Captor
private
ArgumentCaptor
<
Runnable
>
runnableCaptor
;
@Before
public
void
setup
()
{
MockitoAnnotations
.
initMocks
(
this
);
}
@Test
public
void
messageMustNotBeNull
()
throws
Exception
{
thrown
.
expect
(
IllegalArgumentException
.
class
);
thrown
.
expectMessage
(
"Message must not be null"
);
this
.
channel
.
send
(
null
);
}
@Test
public
void
payloadMustNotBeNull
()
throws
Exception
{
Message
<?>
message
=
mock
(
Message
.
class
);
thrown
.
expect
(
IllegalArgumentException
.
class
);
thrown
.
expectMessage
(
"Message payload must not be null"
);
this
.
channel
.
send
(
message
);
}
@Test
public
void
sendWithoutExecutor
()
{
this
.
channel
.
subscribe
(
this
.
handler
);
this
.
channel
.
send
(
this
.
message
);
verify
(
this
.
handler
).
handleMessage
(
this
.
message
);
}
@Test
public
void
sendWithExecutor
()
throws
Exception
{
Executor
executor
=
mock
(
Executor
.
class
);
this
.
channel
=
new
PublishSubscribeChannel
(
executor
);
this
.
channel
.
subscribe
(
this
.
handler
);
this
.
channel
.
send
(
this
.
message
);
verify
(
executor
).
execute
(
this
.
runnableCaptor
.
capture
());
verify
(
this
.
handler
,
never
()).
handleMessage
(
this
.
message
);
this
.
runnableCaptor
.
getValue
().
run
();
verify
(
this
.
handler
).
handleMessage
(
this
.
message
);
}
@Test
public
void
subscribeTwice
()
throws
Exception
{
assertThat
(
this
.
channel
.
subscribe
(
this
.
handler
),
equalTo
(
true
));
assertThat
(
this
.
channel
.
subscribe
(
this
.
handler
),
equalTo
(
false
));
this
.
channel
.
send
(
this
.
message
);
verify
(
this
.
handler
,
times
(
1
)).
handleMessage
(
this
.
message
);
}
@Test
public
void
unsubscribeTwice
()
throws
Exception
{
this
.
channel
.
subscribe
(
this
.
handler
);
assertThat
(
this
.
channel
.
unsubscribe
(
this
.
handler
),
equalTo
(
true
));
assertThat
(
this
.
channel
.
unsubscribe
(
this
.
handler
),
equalTo
(
false
));
this
.
channel
.
send
(
this
.
message
);
verify
(
this
.
handler
,
never
()).
handleMessage
(
this
.
message
);
}
@Test
public
void
failurePropagates
()
throws
Exception
{
RuntimeException
ex
=
new
RuntimeException
();
willThrow
(
ex
).
given
(
this
.
handler
).
handleMessage
(
this
.
message
);
MessageHandler
secondHandler
=
mock
(
MessageHandler
.
class
);
this
.
channel
.
subscribe
(
this
.
handler
);
this
.
channel
.
subscribe
(
secondHandler
);
try
{
this
.
channel
.
send
(
message
);
}
catch
(
RuntimeException
actualException
)
{
assertThat
(
actualException
,
equalTo
(
ex
));
}
verifyZeroInteractions
(
secondHandler
);
}
@Test
public
void
concurrentModification
()
throws
Exception
{
this
.
channel
.
subscribe
(
new
MessageHandler
()
{
@Override
public
void
handleMessage
(
Message
<?>
message
)
throws
MessagingException
{
channel
.
unsubscribe
(
handler
);
}
});
this
.
channel
.
subscribe
(
this
.
handler
);
this
.
channel
.
send
(
this
.
message
);
verify
(
this
.
handler
).
handleMessage
(
this
.
message
);
}
}
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