MemoryHandler Class
Definition
Important
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Handler that buffers requests in a circular buffer in memory.
[Android.Runtime.Register("java/util/logging/MemoryHandler", DoNotGenerateAcw=true)]
public class MemoryHandler : Java.Util.Logging.Handler[<Android.Runtime.Register("java/util/logging/MemoryHandler", DoNotGenerateAcw=true)>]
type MemoryHandler = class
inherit Handler- Inheritance
- Attributes
Remarks
Handler that buffers requests in a circular buffer in memory.
Normally this Handler simply stores incoming LogRecords into its memory buffer and discards earlier records. This buffering is very cheap and avoids formatting costs. On certain trigger conditions, the MemoryHandler will push out its current buffer contents to a target Handler, which will typically publish them to the outside world.
There are three main models for triggering a push of the buffer: <ul> <li> An incoming LogRecord has a type that is greater than a pre-defined level, the pushLevel. </li> <li> An external class calls the push method explicitly. </li> <li> A subclass overrides the log method and scans each incoming LogRecord and calls push if a record matches some desired criteria. </li> </ul>
<b>Configuration:</b> By default each MemoryHandler is initialized using the following LogManager configuration properties where <handler-name> refers to the fully-qualified class name of the handler. If properties are not defined (or have invalid values) then the specified default values are used. If no default value is defined then a RuntimeException is thrown. <ul> <li> <handler-name>.level specifies the level for the Handler (defaults to Level.ALL). </li> <li> <handler-name>.filter specifies the name of a Filter class to use (defaults to no Filter). </li> <li> <handler-name>.size defines the buffer size (defaults to 1000). </li> <li> <handler-name>.push defines the pushLevel (defaults to level.SEVERE). </li> <li> <handler-name>.target specifies the name of the target Handler class. (no default). </li> </ul>
For example, the properties for MemoryHandler would be: <ul> <li> java.util.logging.MemoryHandler.level=INFO </li> <li> java.util.logging.MemoryHandler.formatter=java.util.logging.SimpleFormatter </li> </ul>
For a custom handler, e.g. com.foo.MyHandler, the properties would be: <ul> <li> com.foo.MyHandler.level=INFO </li> <li> com.foo.MyHandler.formatter=java.util.logging.SimpleFormatter </li> </ul>
Added in 1.4.
Java documentation for java.util.logging.MemoryHandler.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Constructors
| Name | Description |
|---|---|
| MemoryHandler() |
Create a |
| MemoryHandler(Handler, Int32, Level) |
Create a |
| MemoryHandler(IntPtr, JniHandleOwnership) |
A constructor used when creating managed representations of JNI objects; called by the runtime. |
Properties
| Name | Description |
|---|---|
| Class |
Returns the runtime class of this |
| Encoding |
Return the character encoding for this |
| ErrorManager |
Retrieves the ErrorManager for this Handler. -or- Define an ErrorManager for this Handler. (Inherited from Handler) |
| Filter |
Get the current |
| Formatter |
Return the |
| Handle |
The handle to the underlying Android instance. (Inherited from Object) |
| JniIdentityHashCode |
Gets the identity hash code assigned to this Java peer by the interop runtime. (Inherited from Object) |
| JniPeerMembers | |
| Level |
Get the log level specifying which messages will be
logged by this |
| PeerReference |
Gets the JNI object reference for this Java peer. (Inherited from Object) |
| PushLevel |
Get the |
| ThresholdClass |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. |
| ThresholdType |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. |
Methods
| Name | Description |
|---|---|
| Clone() |
Creates and returns a copy of this object. (Inherited from Object) |
| Close() |
Close the |
| Dispose() |
Releases the resources held by this Java peer. (Inherited from Object) |
| Dispose(Boolean) |
Releases the resources held by this Java peer. (Inherited from Object) |
| Equals(Object) |
Indicates whether some other object is "equal to" this one. (Inherited from Object) |
| Flush() |
Causes a flush on the target |
| GetHashCode() |
Returns a hash code value for the object. (Inherited from Object) |
| IsLoggable(LogRecord) |
Check if this |
| JavaFinalize() |
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object) |
| Notify() |
Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object) |
| NotifyAll() |
Wakes up all threads that are waiting on this object's monitor. (Inherited from Object) |
| Publish(LogRecord) |
Store a |
| Push() |
Push any buffered output to the target |
| ReportError(String, Exception, Int32) |
Protected convenience method to report an error to this Handler's ErrorManager. (Inherited from Handler) |
| SetHandle(IntPtr, JniHandleOwnership) |
Sets the Handle property. (Inherited from Object) |
| ToArray<T>() |
Creates a managed array from this Java array wrapper. (Inherited from Object) |
| ToString() |
Returns a string representation of the object. (Inherited from Object) |
| UnregisterFromRuntime() |
Unregisters this Java peer from the interop runtime. (Inherited from Object) |
| Wait() |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object) |
| Wait(Int64, Int32) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
| Wait(Int64) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
Explicit Interface Implementations
| Name | Description |
|---|---|
| IJavaPeerable.Disposed() |
Notifies the interop runtime that this managed peer has been disposed. (Inherited from Object) |
| IJavaPeerable.DisposeUnlessReferenced() |
Releases this Java peer unless it is retained by another managed reference. (Inherited from Object) |
| IJavaPeerable.Finalized() |
Notifies the interop runtime that this managed peer has been finalized. (Inherited from Object) |
| IJavaPeerable.JniManagedPeerState |
Gets the state that describes the relationship between this managed peer and its JNI reference. (Inherited from Object) |
| IJavaPeerable.SetJniIdentityHashCode(Int32) |
Sets the interop identity hash code for this Java peer. (Inherited from Object) |
| IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates) |
Sets the managed and JNI peer state for this Java peer. (Inherited from Object) |
| IJavaPeerable.SetPeerReference(JniObjectReference) |
Sets the JNI object reference used by this managed peer. (Inherited from Object) |
Extension Methods
| Name | Description |
|---|---|
| GetJniTypeName(IJavaPeerable) |
Gets the JNI name of the type of the instance |
| JavaAs<TResult>(IJavaPeerable) |
Try to coerce |
| JavaCast<TResult>(IJavaObject) |
Performs an Android runtime-checked type conversion. |
| JavaCast<TResult>(IJavaObject) | |
| TryJavaCast<TResult>(IJavaPeerable, TResult) |
Try to coerce |