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## org.apache.tapestry5.ioc.services
Interface PerThreadValue<T>

    public interface PerThreadValue<T>

Provides access to per-thread (and, by extension, per-request) data, managed by the `PerthreadManager`. A PerThreadValue stores a particular type of information.

Since:
  5.2.0
See Also:
  `PerthreadManager.createValue()`

Method Summary
`boolean` | `exists()` Is a value stored (even null)?
`T` | `get()` Reads the current per-thread value, or returns null if no value has been stored.
`T` | `get(T defaultValue)` Gets the current per-thread value if it exists (even if null), or the defaultValue if no value has been stored.
`T` | `set(T newValue)` Sets the current per-thread value, then returns that value.

Method Detail

### exists

    boolean exists()

  Is a value stored (even null)?

### get

    T get()

  Reads the current per-thread value, or returns null if no value has been stored.

### get

    T get(T defaultValue)

  Gets the current per-thread value if it exists (even if null), or the defaultValue if no value has been stored.

### set

    T set(T newValue)

  Sets the current per-thread value, then returns that value.

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