Apex Developer Guide

Apex Developer Guide
Getting Started with Apex
Writing Apex
Running Apex
Invoking Apex
Apex Transactions and Governor Limits
Using Salesforce Features with Apex
Actions
Approval Processing
Authentication
Chatter Answers and Ideas
Chatter in Apex
Moderate Chatter Private Messages with Triggers
Moderate Feed Items with Triggers
Communities
Email
Metadata
Platform Cache
Platform Cache Features
Platform Cache Considerations
Platform Cache Limits
Platform Cache Partitions
Platform Cache Internals
Store and Retrieve Values from the Session Cache
Store and Retrieve Values from the Org Cache
Use a Visualforce Global Variable for the Platform Cache
Safely Cache Values with the CacheBuilder Interface
Platform Cache Best Practices
Salesforce Knowledge
Salesforce Files
Salesforce Connect
Salesforce Reports and Dashboards API via Apex
Salesforce Sites
Support Classes
Territory Management 2.0
Flows
Integration and Apex Utilities
Debugging, Testing, and Deploying Apex
Apex Language Reference
Appendices
Glossary
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Use a Visualforce Global Variable for the Platform Cache

You can access cached values stored in the session or org cache from a Visualforce page with global variables.

You can use either the $Cache.Session or $Cache.Org global variable. Include the global variable’s fully qualified key name with the namespace and partition name.

This output text component retrieves a session cache value using the global variable’s namespace, partition, and key.

This example is similar but uses the $Cache.Org global variable to retrieve a value from the org cache.

The remaining examples show how to access the session cache using the $Cache.Session global variable. The equivalent org cache examples are the same except that you use the $Cache.Org global variable instead.

Note

Unlike with Apex methods, you can’t omit the myNamespace.myPartition prefix to reference the default partition in the org.

If a namespace isn’t defined for the org, use local to refer to the org’s namespace.

The cached value is sometimes a data structure that has properties or methods, like an Apex list or a custom class. In this case, you can access the properties in the $Cache.Session or $Cache.Org expression by using dot notation. For example, this markup invokes the List.size() Apex method if the value of numbersList is declared as a List.

This example accesses the value property on the myData cache value that is declared as a custom class.

If you’re using CacheBuilder, qualify the key name with the class that implements the CacheBuilder interface and the literal string _B_, in addition to the namespace and partition name. In this example, the class that implements CacheBuilder is called CacheBuilderImpl.