Class LocalDatastoreHelper (2.22.0)

public class LocalDatastoreHelper extends BaseEmulatorHelper<DatastoreOptions>

Utility to start and stop local Google Cloud Datastore emulators.

This class is unstable.

Inheritance

java.lang.Object > com.google.cloud.testing.BaseEmulatorHelper > LocalDatastoreHelper

Inherited Members

com.google.cloud.testing.BaseEmulatorHelper.findAvailablePort(int)

com.google.cloud.testing.BaseEmulatorHelper.getEmulatorRunners()

com.google.cloud.testing.BaseEmulatorHelper.getLogger()

com.google.cloud.testing.BaseEmulatorHelper.getOptions()

com.google.cloud.testing.BaseEmulatorHelper.getPort()

com.google.cloud.testing.BaseEmulatorHelper.getProjectId()

com.google.cloud.testing.BaseEmulatorHelper.isWindows()

com.google.cloud.testing.BaseEmulatorHelper.reset()

com.google.cloud.testing.BaseEmulatorHelper.sendPostRequest(java.lang.String)

com.google.cloud.testing.BaseEmulatorHelper.start()

com.google.cloud.testing.BaseEmulatorHelper.startProcess(java.lang.String)

com.google.cloud.testing.BaseEmulatorHelper.stop(org.threeten.bp.Duration)

com.google.cloud.testing.BaseEmulatorHelper.waitForProcess(org.threeten.bp.Duration)

Object.clone()

Object.equals(Object)

Object.finalize()

Object.getClass()

Object.hashCode()

Object.notify()

Object.notifyAll()

Object.toString()

Object.wait()

Object.wait(long)

Object.wait(long,int)

Static Methods

create()

public static LocalDatastoreHelper create()

Creates a local Datastore helper with a placeholder project ID and the default consistency setting of 0.9. Consistency refers to the fraction of Datastore writes that are immediately visible to global queries, with 0.0 meaning no writes are immediately visible and 1.0 meaning all writes are immediately visible.

Returns
Type	Description
`LocalDatastoreHelper`

create(double consistency)

public static LocalDatastoreHelper create(double consistency)

Creates a local Datastore helper with the specified settings for project ID and consistency.

Parameter
Name	Description
`consistency`	`double` the fraction of Datastore writes that are immediately visible to global queries, with 0.0 meaning no writes are immediately visible and 1.0 meaning all writes are immediately visible. Note that setting this to 1.0 may mask incorrect assumptions about the consistency of non-ancestor queries; non-ancestor queries are eventually consistent.

Returns
Type	Description
`LocalDatastoreHelper`

create(double consistency, int port)

public static LocalDatastoreHelper create(double consistency, int port)

Creates a local Datastore helper with the specified settings for project ID and consistency.

Parameters
Name	Description
`consistency`	`double` the fraction of Datastore writes that are immediately visible to global queries, with 0.0 meaning no writes are immediately visible and 1.0 meaning all writes are immediately visible. Note that setting this to 1.0 may mask incorrect assumptions about the consistency of non-ancestor queries; non-ancestor queries are eventually consistent.
`port`	`int` the port to be used to start the emulator service. Note that setting this to 0 the emulator will search for a free random port.

Returns
Type	Description
`LocalDatastoreHelper`

create(int port)

public static LocalDatastoreHelper create(int port)

Creates a local Datastore helper with a placeholder project ID and the default consistency setting of 0.9.

Parameter
Name	Description
`port`	`int` the port to be used to start the emulator service. Note that setting this to 0 the emulator will search for a free random port.

Returns
Type	Description
`LocalDatastoreHelper`

newBuilder()

public static LocalDatastoreHelper.Builder newBuilder()

Returns a builder for LocalDatastoreHelper object.

Returns
Type	Description
`LocalDatastoreHelper.Builder`

Methods

getConsistency()

public double getConsistency()

Returns the consistency setting for the local Datastore emulator.

Returns
Type	Description
`double`

getEmulatorRunners()

protected List<BaseEmulatorHelper.EmulatorRunner> getEmulatorRunners()

Returns
Type	Description
`List<com.google.cloud.testing.BaseEmulatorHelper.EmulatorRunner>`

Overrides

com.google.cloud.testing.BaseEmulatorHelper.getEmulatorRunners()

getGcdPath()

public Path getGcdPath()

Returns the data directory path of the local Datastore emulator.

Returns
Type	Description
`Path`

getLogger()

protected Logger getLogger()

Returns
Type	Description
`Logger`

Overrides

com.google.cloud.testing.BaseEmulatorHelper.getLogger()

getOptions()

public DatastoreOptions getOptions()

Returns a DatastoreOptions instance that sets the host to use the Datastore emulator on localhost.

Returns
Type	Description
`DatastoreOptions`

Overrides

com.google.cloud.testing.BaseEmulatorHelper.getOptions()

getOptions(String namespace)

public DatastoreOptions getOptions(String namespace)

Returns a DatastoreOptions instance that sets the host to use the Datastore emulator on localhost. The default namespace is set to namespace.

Please use setNamespace and then build() instead.

Parameter
Name	Description
`namespace`	`String`

Returns
Type	Description
`DatastoreOptions`

isStoreOnDisk()

public boolean isStoreOnDisk()

Returns true data persist on disk, otherwise false data not store on disk.

Returns
Type	Description
`boolean`

reset()

public void reset()

Resets the internal state of the Datastore emulator.

When running tests, one might reset() before each test, so earlier tests would not affect later ones.

Overrides

com.google.cloud.testing.BaseEmulatorHelper.reset()

Exceptions
Type	Description
`IOException`

setNamespace(String namespace)

public DatastoreOptions.Builder setNamespace(String namespace)

Parameter
Name	Description
`namespace`	`String`

Returns
Type	Description
`DatastoreOptions.Builder`

start()

public void start()

Starts the local Datastore emulator through gcloud, downloads and caches the zip file if user does not have gcloud or a compatible emulator version installed.

Currently the emulator does not persist any state across runs.

Overrides

com.google.cloud.testing.BaseEmulatorHelper.start()

Exceptions
Type	Description
`IOException`
`InterruptedException`

stop()

public void stop()

Stops the Datastore emulator. The same as #stop(Duration) but with timeout duration of 20 seconds.

It is important to stop the emulator. Since the emulator runs in its own process, not stopping it might cause it to become orphan.

It is not required to call #reset() before stop().

Exceptions
Type	Description
`IOException`
`InterruptedException`
`TimeoutException`

stop(Duration timeout)

public void stop(Duration timeout)

Stops the Datastore emulator.

It is important to stop the emulator. Since the emulator runs in its own process, not stopping it might cause it to become orphan.

It is not required to call #reset() before stop.

Parameter
Name	Description
`timeout`	`org.threeten.bp.Duration` The duration to wait for the emulator process to stop. It is recommended to set this value high to ensure proper shutdown, like 5 seconds or more.

Overrides

com.google.cloud.testing.BaseEmulatorHelper.stop(org.threeten.bp.Duration)

Exceptions
Type	Description
`IOException`
`InterruptedException`
`TimeoutException`

toBuilder()

public LocalDatastoreHelper.Builder toBuilder()

Returns a builder for LocalDatastoreHelper object.

Returns
Type	Description
`LocalDatastoreHelper.Builder`