Dgraph brick

A Dgraph brick runs the Dgraph (the MDEX Engine software).

Dgraph brick settings

Setting	Description
`input`	The file prefix for the output from Dgidx.
`port`	The port at which the Dgraph should listen. The default is 8000.
`startup_timeout`	Specifies the amount of time in seconds that the Control Interpreter will wait while starting the Dgraph. If it cannot determine that the Dgraph is running in this timeframe, it times out. The default is 60.
`dgraph_binary`	Path to the Dgraph (MDEX Engine) program. Note: You use this setting to override the `endeca_mdex_bin` default setting.
`dgraph_options`	Command-line flags to pass to Dgraph. Note: `--spellpath` is now automatically included unless you add it yourself and will be set to the directory containing the Dgidx output.
`log_dir`	Directory where the Dgraph writes its request log files.
`stdout`	Where to redirect `stdout` for the brick. By default, `stdout` is sent to the screen. Specifying a value for `stdout` overrides the `stdout_base` setting.
`stderr`	Where to redirect `stderr` for the brick. By default, `stderr` is sent to the screen. Specifying a value for `stderr` overrides the `stderr_base` setting.

The commands listed below can be used within Script bricks to control the Dgraph program:

Command	Description
`start`	Starts the Dgraph. Note: This command succeeds even if the Dgraph is already started.
`running`	Succeeds if the Dgraph is running. This operation can be used to conditionalize a script (for example, “`if dgraph.running …`”) or to check assumptions (like an assertion that the Dgraph is running at a certain time).
`stop`	Stops the Dgraph. Note: This command succeeds even if the Dgraph is already stopped.
`update`	Checks for the presence of partial updates. If any partial update files are present, they are uploaded to the Dgraph.

This an example of a Dgraph brick called dg01:

dg01 : Dgraph
	working_machine = indexer
	port = 5555
	input = input.\indexed

The following excerpt from a Script brick illustrates how Dgraph commands work. This example shows how to stop and restart a running Dgraph:

restart_dg01 : Script
	dg01.stop
	dg01.start