com.streambase.liveview.server.table.plugin

Interface TableProviderControl

All Known Implementing Classes:

TableProviderControlImpl

public interface TableProviderControl

When implementing a TableProvider, you should hold on to the TableProviderControl that is passed to you in your initialize method. This will provide access to all the operations you will need to do in providing and removing Tables.

Since:

LiveView 1.6

Method Summary

Modifier and Type	Method and Description
void	clearRetryCount() This will set the failedRetryCount to zero.
void	delete(java.lang.String remappedName) Delete the table with this ID.
void	disableAllAndRestart() When a condition arises where the table provider is unable to service any of tables, but it does not wish to have its tables removed from the system.
CatalogedTable	getTable(java.lang.String remappedName) Find the Table with this ID.
java.util.Collection<CatalogedTable>	getTables() Get a collection of all the CatalogedTables that belong to your TableProvider.
void	insert(CatalogedTable catalogedTable) Insert this Table.
java.io.File	locateFile(java.lang.String filename, boolean required) This will attempt to locate a file within the project.
void	setEnabled(java.lang.String tableId, boolean enabled) Change the enabled state of an existing table.
void	shutMeDown() Shut down the associated TableProvider.
void	update(CatalogedTable catalogedTable) Update this Table.
void	upsert(CatalogedTable catalogedTable) Insert or Update the Table, depending on whether or not it already exists.

Method Detail

setEnabled

void setEnabled(java.lang.String tableId,
                boolean enabled)
         throws LiveViewException

Change the enabled state of an existing table. This is a shortcut over update when you only need to enable or disable the Table. However, it will not update anything else in the Table.

Parameters:

tableId - The ID of the Table to change.

enabled - The new state to change it to.

Throws:

LiveViewException - if attempting to set a table that does not exist enabled. (Setting a non-existant table disabled is ignored.)

getTable

CatalogedTable getTable(java.lang.String remappedName)

Find the Table with this ID. If one doesn't exist, then it will return null.

Parameters:

remappedName - The ID by which the table is saved (i.e. the remapped name)

Returns:

null if no Table has that name.

getTables

java.util.Collection<CatalogedTable> getTables()

Get a collection of all the CatalogedTables that belong to your TableProvider. This list it returns is a copy of the real list, so it will not reflect any changes you might make.

Returns:

all the CatalogedTables that belong to your TableProvider

Since:

2.0.1

insert

void insert(CatalogedTable catalogedTable)

Insert this Table. It is an error if a Table with that ID already exists.

Parameters:

catalogedTable - The Table to insert. Note that the catalogedTable will be copied so further changes to it will not affect anything until you update or upsert.

update

void update(CatalogedTable catalogedTable)

Update this Table. It is an error if a Table with that ID does not already exist.

Parameters:

catalogedTable - The Table to insert. Note that the catalogedTable will be copied so further changes to it will not affect anything until you update or upsert.

upsert

void upsert(CatalogedTable catalogedTable)

Insert or Update the Table, depending on whether or not it already exists.

Parameters:

catalogedTable - The Table to insert. Note that the catalogedTable will be copied so further changes to it will not affect anything until you update or upsert.

delete

void delete(java.lang.String remappedName)

Delete the table with this ID. It is an error if a Table with that ID does not already exist.

Parameters:

remappedName -

shutMeDown

void shutMeDown()

Shut down the associated TableProvider. This is called by the TableProvider upon his learning that his back end is no longer available. These steps will happen on your behalf: - Your tables will all be marked as disabled (which will prevent new queries) - All your active QueryListeners will be closed. This will cause your table's removeListener method to be called. - Your shutdown method will be called - (If you haven't already done so) all your tables will be removed from the Table List (as if you had called delete on them). - If requested in the LVConf or service call, after the specified delay a new instance of your TableProvider will be started up again with the same arguments.

disableAllAndRestart

void disableAllAndRestart()

When a condition arises where the table provider is unable to service any of tables, but it does not wish to have its tables removed from the system. This method will mark the providers tables as disabled and schedule a restart, if the provider has been so configured. The table provider is responsible for closing any active queries if it can no longer service them.

clearRetryCount

void clearRetryCount()

This will set the failedRetryCount to zero. The failedRetryCount is compared to the MaxRetryCount value that was set by the user in the LVConf (or the web service). This method will be called automatically if your start() method returns normally. However, if you keep the start thread and use it to poll your server (which you are welcome to do), then you should call this method yourself once you've successfully connected.

locateFile

java.io.File locateFile(java.lang.String filename,
                        boolean required)
                 throws LiveViewException

This will attempt to locate a file within the project.

Parameters:

filename - indicates a file in the LiveView project

required - if true, this method will throw an exception if the file can't be found.

Returns:

reference to the actual file, or null if it could not be found (or filename was empty) and required was false.

Throws:

LiveViewException - thrown if the required flag was true and either filename was empty or it couldn't find the file.