org.apache.http.protocol

## Interface HttpContext

All Known Implementing Classes:
  BasicHttpContext, DefaultedHttpContext, HttpCoreContext, SyncBasicHttpContext

    public interface HttpContext

HttpContext represents execution state of an HTTP process. It is a structure that can be used to map an attribute name to an attribute value.

The primary purpose of the HTTP context is to facilitate information sharing among various logically related components. HTTP context can be used to store a processing state for one message or several consecutive messages. Multiple logically related messages can participate in a logical session if the same context is reused between consecutive messages.

/ IMPORTANT: Please note HTTP context implementation, even when thread safe, may not be used concurrently by multiple threads, as the context may contain thread unsafe attributes.

Since:
  4.0

### Field Summary

Fields
`static String` `RESERVED_PREFIX` The prefix reserved for use by HTTP components.

### Method Summary

Methods
`Object` `getAttribute(String id)` Obtains attribute with the given name.
`Object` `removeAttribute(String id)` Removes attribute with the given name from the context.
`void` `setAttribute(String id, Object obj)` Sets value of the attribute with the given name.

### Field Detail

#### RESERVED_PREFIX

    static final String RESERVED_PREFIX

The prefix reserved for use by HTTP components. "http."

See Also:
  Constant Field Values

### Method Detail

#### getAttribute

    Object getAttribute(String id)

Obtains attribute with the given name.

Parameters:
  `id` - the attribute name.
Returns:
  attribute value, or `null` if not set.

#### setAttribute

    void setAttribute(String id,
                    Object obj)

Sets value of the attribute with the given name.

Parameters:
  `id` - the attribute name.
  `obj` - the attribute value.

#### removeAttribute

    Object removeAttribute(String id)

Removes attribute with the given name from the context.

Parameters:
  `id` - the attribute name.
Returns:
  attribute value, or `null` if not set.