Module net.pincette.jes

Package net.pincette.jes

Class Util

java.lang.Object

net.pincette.jes.Util

public class Util
extends Object

Some general utilities.

Since:

3.0

Author:

Werner Donné

Method Summary

Modifier and Type	Method	Description
static Reducer	compose(Reducer validator, Reducer reducer)	Returns a reducer that first calls validator and if the result doesn't contain any errors it calls reducer.
static Optional<String>	getUsername(JsonObject json)	Returns the username from "/_jwt/sub".
static boolean	isJesObject(JsonObject json)	Checks if json is a JSON Event Sourcing object.
static boolean	isManagedObject(JsonObject json)	Checks if json is a managed object.
static boolean	isManagedObject(JsonObject json, String type, String id)	Checks if json is a managed object with the fields _id and _type set to id and type respectively.
static Stream<JsonObject>	reconstruct(Stream<? extends JsonValue> events)	Reconstructs aggregate instances using a sequence of events.
static Stream<JsonObject>	reconstruct(JsonArray events)	Reconstructs aggregate instances using a sequence of events.
static Stream<JsonObject>	reconstruct(JsonParser events)	Reconstructs aggregate instances using a sequence of events.
static JsonObjectBuilder	removeTechnical(JsonObject json)	Removes all the technical fields JES uses.

Methods inherited from class java.lang.Object

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

Method Details

compose

public static Reducer compose(Reducer validator,
 Reducer reducer)

Returns a reducer that first calls validator and if the result doesn't contain any errors it calls reducer.

Parameters:

validator - the given validator.

reducer - the given reducer.

Returns:

The composed function.

Since:

1.0

getUsername

public static Optional<String> getUsername(JsonObject json)

Returns the username from "/_jwt/sub".

Parameters:

json - the given object.

Returns:

The username.

Since:

1.0

isJesObject

public static boolean isJesObject(JsonObject json)

Checks if json is a JSON Event Sourcing object. This means it has the fields _id and _type.

Parameters:

json - the given object.

Returns:

The check report.

Since:

1.1.2

See Also:

• JsonFields

isManagedObject

public static boolean isManagedObject(JsonObject json)

Checks if json is a managed object. This means it has the fields _id, _type and _seq.

Parameters:

json - the given object.

Returns:

The check report.

Since:

1.0

See Also:

• JsonFields

isManagedObject

public static boolean isManagedObject(JsonObject json,
 String type,
 String id)

Checks if json is a managed object with the fields _id and _type set to id and type respectively.

Parameters:

json - the given object.

type - the aggregate type.

id - the ID of the instance.

Returns:

The check report.

Since:

1.0

reconstruct

public static Stream<JsonObject> reconstruct(JsonArray events)

Reconstructs aggregate instances using a sequence of events.

Parameters:

events - the array of events, which should start at _seq equal to 0 and which should no holes in the numbering.

Returns:

The reconstructed aggregate instance stream. The events are applied one after the other and each intermediate aggregate instance is emitted in the stream.

Since:

1.2

reconstruct

public static Stream<JsonObject> reconstruct(JsonParser events)

Reconstructs aggregate instances using a sequence of events.

Parameters:

events - the event parser, which should start returning objects at _seq equal to 0 and which should no holes in the numbering.

Returns:

The reconstructed aggregate instance stream. The events are applied one after the other and each intermediate aggregate instance is emitted in the stream.

Since:

1.2

reconstruct

public static Stream<JsonObject> reconstruct(Stream<? extends JsonValue> events)

Reconstructs aggregate instances using a sequence of events.

Parameters:

events - the stream of events, which should start at _seq equal to 0 and which should no holes in the numbering.

Returns:

The reconstructed aggregate instance stream. The events are applied one after the other and each intermediate aggregate instance is emitted in the stream.

Since:

1.2

removeTechnical

public static JsonObjectBuilder removeTechnical(JsonObject json)

Removes all the technical fields JES uses.

Parameters:

json - the given JSON object.

Returns:

The new JSON object.

Since:

1.4.2

See Also:

• JsonFields