Examples

Examples that use GemFire clients.
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VMware GemFire .NET Client - Put, Get, Remove
This is VMware GemFire sample code with minimum functions like put, get and remove from a region on cache server(s). It's a command line simple program that connects to a region using cache factory o...
VMware GemFire .NET Client - Session State
This is VMware GemFire sample code that stores a session state for an ASP.NET app (basically .NET Web App). It's a simple command line program that connects to a region using a cache factory object a...
VMware GemFire .NET Client - SSL
Demonstrates basic SSL connection of a VMware GemFire .NET client with a GemFire cluster. It's a simple command line program that connects to a region using the cache factory object and does not invo...
VMware GemFire .NET Client - Using Client Cache XML & Properties File
This is VMware GemFire sample code that uses client.properties file along with client.xml file. This is a sample that uses client.properties file along with client.xml file. This approach applies the...
Spring - Convert Redis HTTP Session State to VMware GemFire
Three examples that show how to convert your Spring Session Data Redis app to use Spring Boot for Vmware GemFire. This repo contains examples of converting Spring Session Data Redis applications to u...
Spring - Convert Spring Data Redis Pub-Sub to VMware GemFire
This example highlights the changes necessary for switching to Spring Boot for VMware GemFire for a Spring Data Redis publish/subscribe app. The projects in this directory illustrate a Spring Boot ap...
REST Client in Python
A guide to using the GemFire REST API from a Python client. GemFire REST Client in Python At the end of this article is an example Python script that accesses a GemFire client using the REST API. To ...
Auto-Serialization Of Objects
This example demonstrates reflection-based auto-serialization to put objects into and get objects out of VMware GemFire regions without relying on Java, PDX, or data serialization. This is a simple e...
Asynchronous Event Queues & Listeners
This is a simple example that demonstrates asynchronous event queues and listeners for VMware GemFire. An asynchronous event queue is an ordered collection of events that occurred on a region, e.g., ...
Client Security
Demonstrates basic command security and user authentication in a client application backed by a secured GemFire cluster. It also demonstrates use of secure sockets (SSL) between all members and betwe...
Compression in Replicated Regions
This example demonstrates enabling Compression in a VMware GemFire replicated region. This is a simple example that demonstrates enabling Compression in a replicated region. The Default compression a...
Continuous Queries
Continuous Queries (CQ) allow clients to subscribe to server-side VMware GemFire events using a SQL-like query. When a client registers a CQ, the client will receive all events that modify the query ...
Entry Eviction
Eviction of entries from a VMware GemFire region allows control over the system resources consumed by any given region. This is a simple example that demonstrates eviction of entries from a region. T...
Entry Expiration
Expiration of entries from a VMware GemFire region can be used to prevent stale entries from lingering in a region. This is a simple example that demonstrates expiration of entries from a region. Thi...
Functions
This example calculates which integers in the region are prime numbers. The determination of the primes occurs inside the server by way of a VMware GemFire function and the client displays the primes...
Durable Messaging
Durable messaging can be used for subscriptions that you need maintained for your VMware GemFire clients even when your clients are down or disconnected. This example demonstrates VMware GemFire’s Du...
GemFire Queries
This example demonstrates simple queries on a VMware GemFire region. In this example, two servers host a single partitioned region with entries that represent employee information. The example does q...
GemFire Rest API
This example demonstrates putting values into a VMware GemFire replicated region and retrieving the values using the GemFire REST API. This is a simple example that demonstrates putting values into a...
JDBC Connector
The JDBC Connector allows VMware GemFire to connect to external data sources with JDBC. Steps Install MySQL: https://dev.mysql.com/downloads/ If your MySQL installation does not include JDBC driver, ...
JSON + GemFire
This example starts a GemFire cluster and uses the JSON-related APIs to convert a JSON string into a JsonDocument. The converted JSON strings are stored as region entry values. The GemFire JSON-relat...
Lucene Indexes
In this example, two VMware GemFire servers host a single partitioned region with entries that represent employee information. The example indexes the first and last names of employees. This example ...
Lucene Spatial Indexing
These examples demonstrate how to use GemFire's LuceneSerializer and LuceneQueryProvider APIs to customize how GemFire data is stored and indexed in Lucene. All the examples are run from Example.java...
OQL Indexing
This example demonstrates an index for OQL queries on a VMware GemFire region. A region can contain objects of arbitrary complexity, including objects that contain other objects. The values of a regi...
Partitioned Regions
This example demonstrates the basic property of partitioning where the data entries are distributed across all VMware GemFire servers that host a region. The distribution is like database sharding, e...
Overflow to Disk
In this example, a VMware GemFire server hosts a partitioned region that stores strings. The example shows entry values being overflowed to disk and removed from memory. This examples demonstrates ho...
Persistent Regions
This example demonstrates VMware GemFire persistent regions. The data for a region resides in memory in the JVM for the server. When a region is persistent, the data for that region is also preserved...
Publish Micrometer Metrics
This example demonstrates publishing metrics from GemFire to a monitoring system comprised of Prometheus and Grafana. Steps to Run and Validate the Example From the gemfire-examples/micrometerMetrics...
Put Multiple Values At Once
This is example demonstrates putting a map of values into a VMware GemFire region, checking the size, and retrieving the values. This example assumes you have installed JDK11 and GemFire. Steps From ...
Region Colocation
This is a simple example that illustrates how to colocate the data of two VMware GemFire regions. By default, GemFire selects the data locations for a partitioned region independent of the data locat...
GemFire Transactions
This example demonstrates the use of VMware GemFire transactions to protect consistency during concurrent access and modification of data. This is a simple example that demonstrates the use of transa...
Replication Between Clusters
This example demonstrates GemFire support for asynchronous replication between clusters. WAN replication allows remote GemFire clusters to automatically keep their region data consistent through the ...
Replication Between Clusters With Delta Objects
This example demonstrates GemFire support for asynchronous replication between clusters using Delta objects. This example demonstrates GemFire support for asynchronous WAN replication between cluster...
Using A Cache Listener
In this example, a VMware GemFire cache listener is installed and notified of each entry creation and then adds it to a queue of events. This is a simple example that demonstrates the use of a cache ...
Using A Cache Loader
This is a simple example that demonstrates loading values using a VMware GemFire CacheLoader. This is a simple example that demonstrates loading values using a CacheLoader. Invoking Region.get() caus...
Using A Cache Writer
In this example, a VMware GemFire cache writer is installed that vets the creation events for the region for proper formatting of Social Security numbers. This is a simple example that demonstrates t...
GemFire Image Search
An example using the GemFire Vector Database extension to perform an image search. An image search webapp that uses VMware GemFire and the VMware GemFire Vector Database extension. Download the exten...
Session State Management with Tomcat
This example demonstrates how to set-up and use VMware GemFire's Session Management Module for Tomcat. This example assumes you have GemFire and Java installed. It also assumes you have local copy of...
Replicated Regions
This is a simple example that demonstrates putting values into a VMware GemFire replicated region, checking the size, and retrieving the values. This example assumes you have installed JDK11 and GemF...