vitalif
/
etcd
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Change key "testAndSet" -> "foo" for clarity

release-0.4
Michael Stillwell 2013-09-13 09:33:44 +01:00
parent 23e99b57a6
commit f923548182
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
README.md
View File

@ -187,17 +187,17 @@ The watch command returns immediately with the same response as previous.
Etcd can be used as a centralized coordination service in a cluster and `TestAndSet` is the most basic operation to build distributed lock service. This command will set the value only if the client provided `prevValue` is equal the current key value.
Here is a simple example. Let's create a key-value pair first: `testAndSet=one`.
Here is a simple example. Let's create a key-value pair first: `foo=one`.
```sh
curl -L http://127.0.0.1:4001/v1/keys/testAndSet -d value=one
curl -L http://127.0.0.1:4001/v1/keys/foo -d value=one
```
Let's try an invaild `TestAndSet` command.
Let's try an invalid `TestAndSet` command.
We can give another parameter prevValue to set command to make it a TestAndSet command.
```sh
curl -L http://127.0.0.1:4001/v1/keys/testAndSet -d prevValue=two -d value=three
curl -L http://127.0.0.1:4001/v1/keys/foo -d prevValue=two -d value=three
```
This will try to test if the previous of the key is two, it is change it to three.
@ -208,16 +208,16 @@ This will try to test if the previous of the key is two, it is change it to thre
which means `testAndSet` failed.
Let us try a vaild one.
Let us try a valid one.
```sh
curl -L http://127.0.0.1:4001/v1/keys/testAndSet -d prevValue=one -d value=two
curl -L http://127.0.0.1:4001/v1/keys/foo -d prevValue=one -d value=two
```
The response should be
```json
{"action":"SET","key":"/testAndSet","prevValue":"one","value":"two","index":10}
{"action":"SET","key":"/foo","prevValue":"one","value":"two","index":10}
```
We successfully changed the value from “one” to “two”, since we give the correct previous value.