CassandraService

CassandraService

The Twyr Web Application Server Cassandra Service.

Constructor

new CassandraService()

Allows the rest of the Twyr Modules to use Cassandra as a NoSQL Storage.

Source:

Allows the rest of the Twyr Modules to use Cassandra as a NoSQL Storage.

Extends

Members

(readonly) basePath :string

Source:
Overrides:
Type:
  • string

(readonly) dependencies :Object

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Overrides:
Type:
  • Object

(readonly) Interface :Object

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Overrides:
Type:
  • Object

(readonly) name :string

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Inherited From:
Type:
  • string

Methods

(async) _changeState(newState) → {undefined}

Enables / disables this module, and all its sub-modules (if any).

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Inherited From:
Parameters:
Name Type Description
newState Object

The next state of this module.
Returns:

Nothing.

Type
undefined

(async) _dependencyReconfigure(dependency) → {undefined}

Lets the module know that one of its dependencies changed configuration.

Source:
Inherited From:
Parameters:
Name Type Description
dependency TwyrBaseModule

The dependency that changed configuration.
Returns:

Nothing.

Type
undefined

(async) _dependencyStateChange(dependency, newState) → {undefined}

Lets the module know that one of its dependencies changed state.

Source:
Inherited From:
Parameters:
Name Type Description
dependency TwyrBaseModule

The dependency that changed state.
newState Object

The next state of the dependency.
Returns:

Nothing.

Type
undefined

(async) _exists(filepath, mode) → {boolean}

Checks to see if the path can be accessed by this process using the mode specified.

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Inherited From:
Parameters:
Name Type Description
filepath string

Path of the filesystem entity.
mode number

Permission to be checked for.
Returns:

True / False.

Type
boolean

_handleUncaughtException(err) → {undefined}

Logs Unhandled Exceptions to prevent the process from crashing.

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Inherited From:
Parameters:
Name Type Description
err Error

The unhandled exception.
Returns:

Nothing.

Type
undefined

(async) _parentReconfigure() → {undefined}

Lets the module know that its parent changed configuration.

Source:
Inherited From:
Returns:

Nothing.

Type
undefined

(async) _parentStateChange(newState) → {undefined}

Lets the module know that its parent changed state.

Source:
Inherited From:
Parameters:
Name Type Description
newState Object

The next state of the parent module.
Returns:

Nothing.

Type
undefined

(async) _reconfigure(newConfig) → {undefined}

Changes the configuration of this module, and informs everyone interested.

Source:
Inherited From:
Parameters:
Name Type Description
newConfig Object

The changed confoguration.
Returns:

Nothing.

Type
undefined

(async) _setup() → {undefined}

To be implemented by derived classes for setting themselves up.

Source:
Overrides:
Returns:

Nothing.

Type
undefined

(async) _subModuleReconfigure(subModule) → {undefined}

Lets the module know that one of its subModules changed configuration.

Source:
Inherited From:
Parameters:
Name Type Description
subModule TwyrBaseModule

The sub-module that changed configuration.
Returns:

Nothing.

Type
undefined

(async) _subModuleStateChange(subModule, newState) → {undefined}

Lets the module know that one of its subModules changed state.

Source:
Inherited From:
Parameters:
Name Type Description
subModule TwyrBaseModule

The sub-module that changed state.
newState Object

The next state of the sub-module.
Returns:

Nothing.

Type
undefined

(async) _teardown() → {undefined}

To be implemented by derived classes for un-setting themselves down.

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Overrides:
Returns:

Nothing.

Type
undefined

(async) initialize() → {Object}

Initializes sub-modules, if any.

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Inherited From:

Call the loader (typically, TwyrModuleLoader#initialize) to initialize sub-modules, if any.

Returns:
  • The aggregated status returned by sub-modules (if any) once they complete their initialization.
Type
Object

(async) load(configSrvc) → {Object}

Loads sub-modules, if any.

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Inherited From:
  1. Use the supplied ConfigurationService instance (if any), to get / store both configuration and state.
  2. Call the loader (typically, TwyrModuleLoader#load) to load sub-modules, if any.
Parameters:
Name Type Description
configSrvc ConfigurationService

Instance of the ConfigurationService that supplies configuration.
Returns:
  • The aggregated status returned by sub-modules (if any) once they complete their loading.
Type
Object

(async) start(dependencies) → {Object}

Starts sub-modules, if any.

Source:
Inherited From:

Call the loader (typically, TwyrModuleLoader#start) to start sub-modules, if any.

Parameters:
Name Type Description
dependencies Object

Interfaces to TwyrBaseService instances that this module depends on.
Returns:
  • The aggregated status returned by sub-modules (if any) once they complete their startup sequences.
Type
Object

(async) stop() → {Object}

Stops sub-modules, if any.

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Inherited From:

Call the loader (typically, TwyrModuleLoader#stop) to shutdown sub-modules, if any.

Returns:
  • The aggregated status returned by sub-modules (if any) once they complete their shutdown sequences.
Type
Object

(async) uninitialize() → {Object}

Uninitializes sub-modules, if any.

Source:
Inherited From:

Call the loader (typically, TwyrModuleLoader#uninitialize) to uninitialize sub-modules, if any.

Returns:
  • The aggregated status returned by sub-modules (if any) once they uninitialize themselves.
Type
Object

(async) unload() → {Object}

Unloads sub-modules, if any.

Source:
Inherited From:

Call the loader (typically, TwyrModuleLoader#unload) to unload sub-modules, if any.

Returns:
  • The aggregated status returned by sub-modules (if any) once they unload themselves.
Type
Object