Robin (I2P Anonymous Network - Java Documentation

java.lang.Object
- org.jrobin.core.Robin

すべての実装されたインタフェース:

RrdUpdater
```
public class Robin
extends java.lang.Object
implements RrdUpdater
```
Class to represent archive values for a single datasource. Robin class is the heart of the so-called "round robin database" concept. Basically, each Robin object is a fixed length array of double values. Each double value reperesents consolidated, archived value for the specific timestamp. When the underlying array of double values gets completely filled, new values will replace the oldest ones.
Robin object does not hold values in memory - such object could be quite large. Instead of it, Robin reads them from the backend I/O only when necessary.

作成者:

Sasa Markovic

コンストラクタの概要

コンストラクタ
コンストラクタ説明

Robin(Archive parentArc, int rows, boolean shouldInitialize)

コンストラクタ
コンストラクタ	説明
`Robin(Archive parentArc, int rows, boolean shouldInitialize)`

メソッドの概要

すべてのメソッドインスタンス・メソッド concreteメソッド
修飾子とタイプ	メソッド	説明
`(package private) void`	`bulkStore(double newValue, int bulkCount)`
`void`	`copyStateTo(RrdUpdater other)`	Copies object's internal state to another Robin object.
`(package private) java.lang.String`	`dump()`
`void`	`filterValues(double minValue, double maxValue)`	Filters values stored in this archive based on the given boundary.
`Archive`	`getParent()`	Returns the Archive object to which this Robin object belongs.
`RrdAllocator`	`getRrdAllocator()`	Required to implement RrdUpdater interface.
`RrdBackend`	`getRrdBackend()`	Returns the underlying storage (backend) object which actually performs all I/O operations.
`int`	`getSize()`	Returns the size of the underlying array of archived values.
`double`	`getValue(int index)`	Returns the i-th value from the Robin archive.
`double[]`	`getValues()`	Fetches all archived values.
`(package private) double[]`	`getValues(int index, int count)`
`void`	`setValue(int index, double value)`	Sets the i-th value in the Robin archive.
`void`	`setValues(double newValue)`	(Re)sets all values in this archive to the same value.
`void`	`setValues(double[] newValues)`	Updates archived values in bulk.
`(package private) void`	`store(double newValue)`
`(package private) void`	`update(double[] newValues)`

クラスから継承されたメソッド java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- コンストラクタの詳細
  - Robin
```
Robin(Archive parentArc,
      int rows,
      boolean shouldInitialize)
throws java.io.IOException
```
    例外:
    
    java.io.IOException
- メソッドの詳細
  - getValues
```
public double[] getValues()
                   throws java.io.IOException
```
    Fetches all archived values.
    
    戻り値:
    
    Array of double archive values, starting from the oldest one.
    
    例外:
    
    java.io.IOException - Thrown in case of I/O specific error.
  - store
```
void store(double newValue)
    throws java.io.IOException
```
    例外:
    
    java.io.IOException
  - bulkStore
```
void bulkStore(double newValue,
               int bulkCount)
        throws java.io.IOException
```
    例外:
    
    java.io.IOException
  - update
```
void update(double[] newValues)
     throws java.io.IOException
```
    例外:
    
    java.io.IOException
  - setValues
```
public void setValues(double[] newValues)
               throws java.io.IOException,
                      RrdException
```
    Updates archived values in bulk.
    
    パラメータ:
    
    newValues - Array of double values to be stored in the archive
    
    例外:
    
    java.io.IOException - Thrown in case of I/O error
    
    RrdException - Thrown if the length of the input array is different from the length of this archive
  - setValues
```
public void setValues(double newValue)
               throws java.io.IOException
```
    (Re)sets all values in this archive to the same value.
    
    パラメータ:
    
    newValue - New value
    
    例外:
    
    java.io.IOException - Thrown in case of I/O error
  - dump
```
java.lang.String dump()
               throws java.io.IOException
```
    例外:
    
    java.io.IOException
  - getValue
```
public double getValue(int index)
                throws java.io.IOException
```
    Returns the i-th value from the Robin archive.
    
    パラメータ:
    
    index - Value index
    
    戻り値:
    
    Value stored in the i-th position (the oldest value has zero index)
    
    例外:
    
    java.io.IOException - Thrown in case of I/O specific error.
  - setValue
```
public void setValue(int index,
                     double value)
              throws java.io.IOException
```
    Sets the i-th value in the Robin archive.
    
    パラメータ:
    
    index - index in the archive (the oldest value has zero index)
    
    value - value to be stored
    
    例外:
    
    java.io.IOException - Thrown in case of I/O specific error.
  - getValues
```
double[] getValues(int index,
                   int count)
            throws java.io.IOException
```
    例外:
    
    java.io.IOException
  - getParent
```
public Archive getParent()
```
    Returns the Archive object to which this Robin object belongs.
    
    戻り値:
    
    Parent Archive object
  - getSize
```
public int getSize()
```
    Returns the size of the underlying array of archived values.
    
    戻り値:
    
    Number of stored values
  - copyStateTo
```
public void copyStateTo(RrdUpdater other)
                 throws java.io.IOException,
                        RrdException
```
    Copies object's internal state to another Robin object.
    
    定義:
    
    copyStateTo インタフェース内 RrdUpdater
    
    パラメータ:
    
    other - New Robin object to copy state to
    
    例外:
    
    java.io.IOException - Thrown in case of I/O error
    
    RrdException - Thrown if supplied argument is not a Robin object
  - filterValues
```
public void filterValues(double minValue,
                         double maxValue)
                  throws java.io.IOException
```
    Filters values stored in this archive based on the given boundary. Archived values found to be outside of [minValue, maxValue] interval (inclusive) will be silently replaced with NaN.
    
    パラメータ:
    
    minValue - lower boundary
    
    maxValue - upper boundary
    
    例外:
    
    java.io.IOException - Thrown in case of I/O error
  - getRrdBackend
```
public RrdBackend getRrdBackend()
```
    Returns the underlying storage (backend) object which actually performs all I/O operations.
    
    定義:
    
    getRrdBackend インタフェース内 RrdUpdater
    
    戻り値:
    
    I/O backend object
  - getRrdAllocator
```
public RrdAllocator getRrdAllocator()
```
    Required to implement RrdUpdater interface. You should never call this method directly.
    
    定義:
    
    getRrdAllocator インタフェース内 RrdUpdater
    
    戻り値:
    
    Allocator object

クラス Robin

コンストラクタの概要

メソッドの概要

クラスから継承されたメソッド java.lang.Object

コンストラクタの詳細

Robin

メソッドの詳細

getValues

store

bulkStore

update

setValues

setValues

dump

getValue

setValue

getValues

getParent

getSize

copyStateTo

filterValues

getRrdBackend

getRrdAllocator