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This example sets up several GemFire instances each with 1 locator and 2 servers. Then it will connect all of the instances together to form a "mesh" network of GemFire Instances.

Mesh Network

How to run

  1. Download and install GemFire and its requirements.
  2. Make sure you have gfsh in the PATH so the scripts can just run the command gfsh.
  3. cd into the scripts directory
  4. ./startGemFire 5 This will launch five GemFire distributed systems. The number of systems can be equal to or greater 2.
  5. ./configureMesh 5 This will configure those five GemFire systems into a mesh network where every distributed system is connnected to every other distributed system.
  6. ./putRandomThenGetOnAll 5 A simple gfh client that looks at the value of a key on each system - does a put on that key with a value of which system did the put and time stamp - then looks at the value on each system for that same key.
  7. ./shutdownGemFire 5 - Cleanly shutdown all of the systems.

Details

Each one of the systems followed this convention if you would like to attach or use any of the distributed systems for a test.

There is one locator for each system. The ports the locator is running on is:

  • JMX Port : 109${systemId}
  • HTTP Services : 707${systemId}
  • Locator : 1033${systemId}

${systemId} is equal to the distributed ID of a given system. The distributed ID starts at 1 and works up from there.

Example:

In the following command we are going to connect to the 5th distributed system.

gfsh>connect --locator=localhost[10335]

That distributed system id is 5 and it is connected to 4 other distributed systems with IDs 1, 2, 3 and 4.

Sample run:

NOTE: The scripts are multithreaded - so the output could be out of order.

cblack@cblack-z01:/mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/scripts$ ./startGemFire 5
Launching system 1 with remote locators : localhost[10332],localhost[10333],localhost[10334],localhost[10335]
Launching system 5 with remote locators : localhost[10331],localhost[10332],localhost[10333],localhost[10334]
Launching system 3 with remote locators : localhost[10331],localhost[10332],localhost[10334],localhost[10335]
Launching system 2 with remote locators : localhost[10331],localhost[10333],localhost[10334],localhost[10335]
Launching system 4 with remote locators : localhost[10331],localhost[10332],localhost[10333],localhost[10335]
        Locator in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site4/locator on 172.21.189.192[10334] as locator is currently online.
        Locator in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site2/locator on 172.21.189.192[10332] as locator is currently online.
        Locator in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site5/locator on 172.21.189.192[10335] as locator is currently online.
        Locator in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site1/locator on 172.21.189.192[10331] as locator is currently online.
        Locator in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site3/locator on 172.21.189.192[10333] as locator is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site1/server1 on 172.21.189.192[42233] as server1 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site5/server1 on 172.21.189.192[46571] as server1 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site2/server2 on 172.21.189.192[46035] as server2 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site2/server1 on 172.21.189.192[45753] as server1 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site4/server1 on 172.21.189.192[35815] as server1 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site5/server2 on 172.21.189.192[41587] as server2 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site1/server2 on 172.21.189.192[38377] as server2 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site3/server1 on 172.21.189.192[35531] as server1 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site4/server2 on 172.21.189.192[41575] as server2 is currently online.
        Server in /mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/data/site3/server2 on 172.21.189.192[34403] as server2 is currently online.
cblack@cblack-z01:/mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/scripts$ ./configureMesh 5
        (2) Executing - create gateway-sender --id='sender1' --parallel=true --remote-distributed-system-id='1'
        (2) Executing - create gateway-sender --id='sender1' --parallel=true --remote-distributed-system-id='1'
        (2) Executing - create gateway-sender --id='sender1' --parallel=true --remote-distributed-system-id='1'
        (2) Executing - create gateway-sender --id='sender1' --parallel=true --remote-distributed-system-id='1'
        (2) Executing - create gateway-sender --id='sender2' --parallel=true --remote-distributed-system-id='2'
        (2) Executing - create gateway-sender --id='sender3' --parallel=true --remote-distributed-system-id='3'
        (2) Executing - create gateway-sender --id='sender3' --parallel=true --remote-distributed-system-id='3'
        (2) Executing - create gateway-sender --id='sender2' --parallel=true --remote-distributed-system-id='2'
        (2) Executing - create gateway-sender --id='sender2' --parallel=true --remote-distributed-system-id='2'
        (2) Executing - create gateway-sender --id='sender2' --parallel=true --remote-distributed-system-id='2'
        (2) Executing - create gateway-sender --id='sender4' --parallel=true --remote-distributed-system-id='4'
        (2) Executing - create gateway-sender --id='sender3' --parallel=true --remote-distributed-system-id='3'
        (2) Executing - create gateway-sender --id='sender4' --parallel=true --remote-distributed-system-id='4'
        (2) Executing - create gateway-sender --id='sender4' --parallel=true --remote-distributed-system-id='4'
        (2) Executing - create gateway-sender --id='sender3' --parallel=true --remote-distributed-system-id='3'
        (2) Executing - create gateway-sender --id='sender5' --parallel=true --remote-distributed-system-id='5'
        (2) Executing - create gateway-sender --id='sender4' --parallel=true --remote-distributed-system-id='4'
        (2) Executing - create gateway-sender --id='sender5' --parallel=true --remote-distributed-system-id='5'
        (2) Executing - create gateway-sender --id='sender5' --parallel=true --remote-distributed-system-id='5'
        (2) Executing - create gateway-sender --id='sender5' --parallel=true --remote-distributed-system-id='5'
        (2) Executing - create gateway-receiver
        (2) Executing - create gateway-receiver
        (2) Executing - create gateway-receiver
        (2) Executing - create gateway-receiver
        (2) Executing - create gateway-receiver
        (2) Executing - create region --name=test --type=PARTITION
        (2) Executing - create region --name=test --type=PARTITION
        (2) Executing - create region --name=test --type=PARTITION
        (2) Executing - create region --name=test --type=PARTITION --gateway-sender-id=sender2,sender3,sender4,sender5
        (2) Executing - create region --name=test --type=PARTITION --gateway-sender-id=sender1,sender2,sender3,sender5
        (2) Executing - alter region --name=test --gateway-sender-id=sender1,sender3,sender4,sender5
        (2) Executing - alter region --name=test --gateway-sender-id=sender1,sender2,sender4,sender5
        (2) Executing - alter region --name=test --gateway-sender-id=sender1,sender2,sender3,sender4
cblack@cblack-z01:/mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/scripts$ ./putRandomThenGetOnAll 5
===========================================================================
Get all of the values from all of the Systems
===========================================================================
 Looking up key value on distributed system 1
        Key         : myKey
        Value       : null
 Looking up key value on distributed system 2
        Key         : myKey
        Value       : null
 Looking up key value on distributed system 3
        Key         : myKey
        Value       : null
 Looking up key value on distributed system 4
        Key         : myKey
        Value       : null
 Looking up key value on distributed system 5
        Key         : myKey
        Value       : null
===========================================================================
Inserting Fri Mar 17 10:03:30 PDT 2023 on a random distributed system 3
===========================================================================
        (1) Executing - connect --locator=localhost[10333]
        (2) Executing - put --key=myKey --value='Insert from distributed system 3 on Fri Mar 17 10:03:30 PDT 2023' --region=test
===========================================================================
Done - Now sleeping to allow the queue to flush. The default asynchronous
gateway queue setting is 1000 ms or 100 events which ever comes first.
===========================================================================
 Looking up key value on distributed system 1
        Key         : myKey
        Value       : "Insert from distributed system 3 on Fri Mar 17 10:03:30 PDT 2023"
 Looking up key value on distributed system 2
        Key         : myKey
        Value       : "Insert from distributed system 3 on Fri Mar 17 10:03:30 PDT 2023"
 Looking up key value on distributed system 3
        Key         : myKey
        Value       : "Insert from distributed system 3 on Fri Mar 17 10:03:30 PDT 2023"
 Looking up key value on distributed system 4
        Key         : myKey
        Value       : "Insert from distributed system 3 on Fri Mar 17 10:03:30 PDT 2023"
 Looking up key value on distributed system 5
        Key         : myKey
        Value       : "Insert from distributed system 3 on Fri Mar 17 10:03:30 PDT 2023"
cblack@cblack-z01:/mnt/c/Users/cblack/dev/projects/samples/gemfire-wan-gateway/scripts$

Directory

.
├── LICENSE.txt - Apache License
├── data - This is where all of the data and logs go.
├── images - Images for the readme.md
├── readme.md - this document
└── scripts
    ├── configureMesh - Create the wan gateway to each member and configure a region for the data to live.
    ├── putRandomThenGetOnAll - A sample to drive the demo.
    ├── shutdownGemFire - Shutdown all of the members in all of the distributed systems.
    └── startGemFire - Start up all of the distributed systems in the demo.