A Simple Java App
The sample Java client app at https://github.com/cf-gemfire-org/cloudcache-sample-app.git demonstrates how to connect an app to a service instance.
These instructions assume:
- A Cloud Cache service instance is running.
- You have Cloud Foundry credentials for accessing the Cloud Cache service instance.
- You have a service key for the Cloud Cache service instance.
- You have a login on the Pivotal Commercial Maven Repository at https://commercial-repo.pivotal.io.
- You have a
gfsh
client of the same version as is used within your Cloud Cache service instance.
Follow these instructions to run the app.
- Clone the sample Java app from https://github.com/cf-gemfire-org/cloudcache-sample-app.git.
- Update your clone of the sample Java app to work with
your Cloud Cache service instance:
- Modify the manifest in
manifest.yml
by replacingservice0
with the name of your Cloud Cache service instance. - Replace the username and password in the
gradle.properties
file with your username and password for the Pivotal Commercial Maven Repository. - Update the GemFire version in the dependencies section of the
build.gradle
file to be the same as the version within your Cloud Cache service instance.
- Modify the manifest in
Build the app with
$ ./gradlew clean build
In a second shell, run
gfsh
.Use
gfsh
to connect to the Cloud Cache service instance as described in Connect with gfsh over HTTPS.Use
gfsh
to create a region namedtest
as described in Create Regions. This sample app places a single entry into the region, so the region type is not important.PARTITION_REDUNDANT
is a good choice.In the shell where the app was built, deploy and run the app with
cf push -f manifest.yml
After the app starts, there will be an entry of (“1”, “one”) in the
test
region. you can see that there is one entry in the region with thegfsh
command:gfsh>describe region --name=test
For this very small region, you can print the contents of the entire region with a
gfsh
query:gfsh>query --query='SELECT * FROM /test'