com.graphaware.runtime.metadata

Class DefaultTxDrivenModuleMetadata

java.lang.Object

com.graphaware.runtime.metadata.DefaultTxDrivenModuleMetadata

All Implemented Interfaces:

ModuleMetadata, TxDrivenModuleMetadata

public class DefaultTxDrivenModuleMetadata
extends Object
implements TxDrivenModuleMetadata

Default production implementation of TxDrivenModuleMetadata.

Constructor Summary

Constructors

Constructor and Description
DefaultTxDrivenModuleMetadata(TxDrivenModuleConfiguration configuration) Construct new metadata.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
TxDrivenModuleConfiguration	getConfig() Get the configuration of the module.
int	hashCode()
DefaultTxDrivenModuleMetadata	markedNeedingInitialization() Create a new instance of this class with TxDrivenModuleMetadata.needsInitialization() returning true.
boolean	needsInitialization() Does the module need initialization?
long	problemTimestamp() Get the time in milliseconds since 1/1/1970 of the first occurrence of a problem that caused the TxDrivenModuleMetadata.needsInitialization() method to return true.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultTxDrivenModuleMetadata

public DefaultTxDrivenModuleMetadata(TxDrivenModuleConfiguration configuration)

Construct new metadata. needsInitialization will return false.

Parameters:

configuration - module configuration held by the metadata.

Method Detail

getConfig

public TxDrivenModuleConfiguration getConfig()

Get the configuration of the module. It is part of the TxDrivenModuleMetadata in order to detect configuration changes after a restart.

Specified by:

getConfig in interface TxDrivenModuleMetadata

Returns:

configuration.

needsInitialization

public boolean needsInitialization()

Does the module need initialization?

Specified by:

needsInitialization in interface TxDrivenModuleMetadata

Returns:

true iff the module needs initialization. This is usually the case when something out-of-sync has been detected during the last run of the database.

problemTimestamp

public long problemTimestamp()

Get the time in milliseconds since 1/1/1970 of the first occurrence of a problem that caused the TxDrivenModuleMetadata.needsInitialization() method to return true.

Specified by:

problemTimestamp in interface TxDrivenModuleMetadata

Returns:

timestamp of the first problem occurrence, -1 if TxDrivenModuleMetadata.needsInitialization() returns false.

markedNeedingInitialization

public DefaultTxDrivenModuleMetadata markedNeedingInitialization()

Create a new instance of this class with TxDrivenModuleMetadata.needsInitialization() returning true. This must cause TxDrivenModuleMetadata.problemTimestamp() to return time representing the instant when this method was called. Same instance of the implementation of this class should be returned when TxDrivenModuleMetadata.needsInitialization() already returns true.

Specified by:

markedNeedingInitialization in interface TxDrivenModuleMetadata

Returns:

new instance of this class with TxDrivenModuleMetadata.needsInitialization() returning true, same instance if that's already the case.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object