uk.ac.ic.doc.automed.qproc.cache
Interface CachePolicy

All Known Implementing Classes:

CachePolicy2, CachePolicy3, DefaultCachePolicy

public interface CachePolicy

CachePolicy.java

Author:

Duc M Le dmle@doc.ic.ac.uk

Field Summary

static int	AD_CHECK_CACHE_FIRST
static int	AD_CHECK_CACHE_LAST
static int	AD_CHECK_CONTAINMENT
static int	CACHE_RESULT
static java.lang.String	CX_GUI
static java.lang.String	CX_QUERY_EVALUATOR
static java.lang.String	CX_QUERY_OPTIMISER
static java.lang.String	CX_QUERY_REFORMULATOR
static java.lang.String	CX_WRAPPER
static int	DO_NOT_USE_CACHE
static int	EV_AFTER_EXECUTION
static int	EV_BEFORE_EXECUTION
static int	EV_FAIL_TO_COMMUNICATE
static int	EV_REMOTE_PEER_NOT_AVAILABLE
static int	EV_SOURCE_SCHEMA_NOT_AVAILABLE
static int	PREFER_CACHE_RESULT
static int	PREFER_LIVE_DATA
static int	USE_CACHE_ONLY
static int	USE_LIVE_DATA_ONLY

Method Summary

int	evaluateAction(java.lang.String context, int eventType, QueryProcessorConfiguration qpc) Evalute a set of of conditions to produce the appropriate cache actions
java.lang.String	getName() Return a default name of a cache policy

Field Detail

USE_CACHE_ONLY

static final int USE_CACHE_ONLY

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Constant Field Values

PREFER_CACHE_RESULT

static final int PREFER_CACHE_RESULT

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Constant Field Values

PREFER_LIVE_DATA

static final int PREFER_LIVE_DATA

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Constant Field Values

DO_NOT_USE_CACHE

static final int DO_NOT_USE_CACHE

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Constant Field Values

CACHE_RESULT

static final int CACHE_RESULT

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Constant Field Values

USE_LIVE_DATA_ONLY

static final int USE_LIVE_DATA_ONLY

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Constant Field Values

AD_CHECK_CONTAINMENT

static final int AD_CHECK_CONTAINMENT

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Constant Field Values

AD_CHECK_CACHE_FIRST

static final int AD_CHECK_CACHE_FIRST

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Constant Field Values

AD_CHECK_CACHE_LAST

static final int AD_CHECK_CACHE_LAST

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Constant Field Values

CX_GUI

static final java.lang.String CX_GUI

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Constant Field Values

CX_QUERY_REFORMULATOR

static final java.lang.String CX_QUERY_REFORMULATOR

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Constant Field Values

CX_QUERY_OPTIMISER

static final java.lang.String CX_QUERY_OPTIMISER

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Constant Field Values

CX_QUERY_EVALUATOR

static final java.lang.String CX_QUERY_EVALUATOR

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Constant Field Values

CX_WRAPPER

static final java.lang.String CX_WRAPPER

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Constant Field Values

EV_BEFORE_EXECUTION

static final int EV_BEFORE_EXECUTION

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Constant Field Values

EV_AFTER_EXECUTION

static final int EV_AFTER_EXECUTION

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Constant Field Values

EV_FAIL_TO_COMMUNICATE

static final int EV_FAIL_TO_COMMUNICATE

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Constant Field Values

EV_SOURCE_SCHEMA_NOT_AVAILABLE

static final int EV_SOURCE_SCHEMA_NOT_AVAILABLE

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Constant Field Values

EV_REMOTE_PEER_NOT_AVAILABLE

static final int EV_REMOTE_PEER_NOT_AVAILABLE

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Constant Field Values

Method Detail

evaluateAction

int evaluateAction(java.lang.String context,
                   int eventType,
                   QueryProcessorConfiguration qpc)

Evalute a set of of conditions to produce the appropriate cache actions

Parameters:

context - The context at which the a cache action is to be produced

eventType - The event (in the specified context) which desires a cache action

qpc - the QueryProcessorConfiguration class which provides user-specified parameters for the evaluation

Returns:

int the action code (see the public constants of this class)

getName

java.lang.String getName()

Return a default name of a cache policy