crabapples
/
Sentinel
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add demo for SlotChainBuilder SPI 

Signed-off-by: Eric Zhao <sczyh16@gmail.com>
This commit is contained in:
Eric Zhao 2018-10-09 17:33:37 +08:00
parent 85540229e9
commit a25f25bea6
6 changed files with 139 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sentinel-demo/pom.xml
View File

@ -27,6 +27,7 @@
<module>sentinel-demo-apollo-datasource</module>
<module>sentinel-demo-annotation-spring-aop</module>
<module>sentinel-demo-parameter-flow-control</module>
<module>sentinel-demo-slot-chain-spi</module>
</modules>
<dependencies>

14
sentinel-demo/sentinel-demo-slot-chain-spi/pom.xml Normal file
View File

@ -0,0 +1,14 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>sentinel-demo</artifactId>
<groupId>com.alibaba.csp</groupId>
<version>0.2.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>sentinel-demo-slot-chain-spi</artifactId>
</project>

45
sentinel-demo/sentinel-demo-slot-chain-spi/src/main/java/com/alibaba/csp/sentinel/demo/slot/DemoSlot.java Normal file
View File

@ -0,0 +1,45 @@
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.csp.sentinel.demo.slot;
import com.alibaba.csp.sentinel.context.Context;
import com.alibaba.csp.sentinel.node.DefaultNode;
import com.alibaba.csp.sentinel.slotchain.AbstractLinkedProcessorSlot;
import com.alibaba.csp.sentinel.slotchain.ResourceWrapper;
/**
* An example slot that records current context and entry resource.
*
* @author Eric Zhao
*/
public class DemoSlot extends AbstractLinkedProcessorSlot<DefaultNode> {
@Override
public void entry(Context context, ResourceWrapper resourceWrapper, DefaultNode node, int count, Object... args)
throws Throwable {
System.out.println("Current context: " + context.getName());
System.out.println("Current entry resource: " + context.getCurEntry().getResourceWrapper().getName());
fireEntry(context, resourceWrapper, node, count, args);
}
@Override
public void exit(Context context, ResourceWrapper resourceWrapper, int count, Object... args) {
System.out.println("Exiting for entry on DemoSlot: " + context.getCurEntry().getResourceWrapper().getName());
fireExit(context, resourceWrapper, count, args);
}
}

36
sentinel-demo/sentinel-demo-slot-chain-spi/src/main/java/com/alibaba/csp/sentinel/demo/slot/DemoSlotChainBuilder.java Normal file
View File

@ -0,0 +1,36 @@
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.csp.sentinel.demo.slot;
import com.alibaba.csp.sentinel.slotchain.ProcessorSlotChain;
import com.alibaba.csp.sentinel.slotchain.SlotChainBuilder;
import com.alibaba.csp.sentinel.slots.DefaultSlotChainBuilder;
/**
* An example slot chain builder. To activate this slot chain builder,
* add the class name to corresponding SPI file in `resource/META-INF/services` directory.
*
* @author Eric Zhao
*/
public class DemoSlotChainBuilder implements SlotChainBuilder {
@Override
public ProcessorSlotChain build() {
ProcessorSlotChain chain = new DefaultSlotChainBuilder().build();
chain.addLast(new DemoSlot());
return chain;
}
}

41
sentinel-demo/sentinel-demo-slot-chain-spi/src/main/java/com/alibaba/csp/sentinel/demo/slot/SlotChainBuilderSpiDemo.java Normal file
View File

@ -0,0 +1,41 @@
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.csp.sentinel.demo.slot;
import com.alibaba.csp.sentinel.Entry;
import com.alibaba.csp.sentinel.SphU;
import com.alibaba.csp.sentinel.slots.block.BlockException;
/**
* @author Eric Zhao
*/
public class SlotChainBuilderSpiDemo {
public static void main(String[] args) {
// You will see this in record.log, indicating that the custom slot chain builder is activated:
// [SlotChainProvider] Global slot chain builder resolved: com.alibaba.csp.sentinel.demo.slot.DemoSlotChainBuilder
Entry entry = null;
try {
entry = SphU.entry("abc");
} catch (BlockException ex) {
ex.printStackTrace();
} finally {
if (entry != null) {
entry.exit();
}
}
}
}

2
sentinel-demo/sentinel-demo-slot-chain-spi/src/main/resources/META-INF/services/com.alibaba.csp.sentinel.slotchain.SlotChainBuilder Normal file
View File

@ -0,0 +1,2 @@
# Custom slot chain builder
com.alibaba.csp.sentinel.demo.slot.DemoSlotChainBuilder