org.apache.beam.runners.dataflow.util

Class CloudObject

java.lang.Object

java.util.AbstractMap<java.lang.String,java.lang.Object>

com.google.api.client.util.GenericData

com.google.api.client.json.GenericJson

org.apache.beam.runners.dataflow.util.CloudObject

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map<java.lang.String,java.lang.Object>

public final class CloudObject
extends com.google.api.client.json.GenericJson
implements java.lang.Cloneable

A representation of an arbitrary Java object to be instantiated by Dataflow workers.

Typically, an object to be written by the SDK to the Dataflow service will implement a method (typically called asCloudObject()) that returns a CloudObject to represent the object in the protocol. Once the CloudObject is constructed, the method should explicitly add additional properties to be presented during deserialization, representing child objects by building additional CloudObjects.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.api.client.util.GenericData

com.google.api.client.util.GenericData.Flags

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Method Summary

Modifier and Type	Method and Description
CloudObject	clone()
static CloudObject	forBoolean(java.lang.Boolean value) Constructs a CloudObject representing the given value.
static CloudObject	forClass(java.lang.Class<?> cls) Constructs a CloudObject to be used for serializing an instance of the supplied class for transport via the Dataflow API.
static CloudObject	forClassName(java.lang.String className) Constructs a CloudObject to be used for serializing data to be deserialized using the supplied class name the supplied class name for transport via the Dataflow API.
static CloudObject	forFloat(java.lang.Double value) Constructs a CloudObject representing the given value.
static CloudObject	forFloat(java.lang.Float value) Constructs a CloudObject representing the given value.
static CloudObject	forInteger(java.lang.Integer value) Constructs a CloudObject representing the given value.
static CloudObject	forInteger(java.lang.Long value) Constructs a CloudObject representing the given value.
static CloudObject	forKnownType(java.lang.Object value) Constructs a CloudObject representing the given value of a well-known cloud object type.
static CloudObject	forString(java.lang.String value) Constructs a CloudObject representing the given value.
static CloudObject	fromSpec(java.util.Map<java.lang.String,java.lang.Object> spec) Constructs a CloudObject by copying the supplied serialized object spec, which must represent an SDK object serialized for transport via the Dataflow API.
java.lang.String	getClassName() Gets the name of the Java class that this CloudObject represents.

Methods inherited from class com.google.api.client.json.GenericJson

getFactory, set, setFactory, toPrettyString, toString

Methods inherited from class com.google.api.client.util.GenericData

entrySet, get, getClassInfo, getUnknownKeys, put, putAll, remove, setUnknownKeys

Methods inherited from class java.util.AbstractMap

clear, containsKey, containsValue, equals, hashCode, isEmpty, keySet, size, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Method Detail

fromSpec

public static CloudObject fromSpec(java.util.Map<java.lang.String,java.lang.Object> spec)

Constructs a CloudObject by copying the supplied serialized object spec, which must represent an SDK object serialized for transport via the Dataflow API.

The most common use of this method is during deserialization on the worker, where it's used as a binding type during instance construction.

Parameters:

spec - supplies the serialized form of the object as a nested map

Throws:

java.lang.RuntimeException - if the supplied map does not represent an SDK object

forClass

public static CloudObject forClass(java.lang.Class<?> cls)

Constructs a CloudObject to be used for serializing an instance of the supplied class for transport via the Dataflow API. The instance parameters to be serialized must be supplied explicitly after the CloudObject is created, by using GenericData.put(java.lang.String, java.lang.Object).

Parameters:

cls - the class to use when deserializing the object on the worker

forClassName

public static CloudObject forClassName(java.lang.String className)

Constructs a CloudObject to be used for serializing data to be deserialized using the supplied class name the supplied class name for transport via the Dataflow API. The instance parameters to be serialized must be supplied explicitly after the CloudObject is created, by using GenericData.put(java.lang.String, java.lang.Object).

Parameters:

className - the class to use when deserializing the object on the worker

forString

public static CloudObject forString(java.lang.String value)

Constructs a CloudObject representing the given value.

Parameters:

value - the scalar value to represent.

forBoolean

public static CloudObject forBoolean(java.lang.Boolean value)

Constructs a CloudObject representing the given value.

Parameters:

value - the scalar value to represent.

forInteger

public static CloudObject forInteger(java.lang.Long value)

Constructs a CloudObject representing the given value.

Parameters:

value - the scalar value to represent.

forInteger

public static CloudObject forInteger(java.lang.Integer value)

Constructs a CloudObject representing the given value.

Parameters:

value - the scalar value to represent.

forFloat

public static CloudObject forFloat(java.lang.Float value)

Constructs a CloudObject representing the given value.

Parameters:

value - the scalar value to represent.

forFloat

public static CloudObject forFloat(java.lang.Double value)

Constructs a CloudObject representing the given value.

Parameters:

value - the scalar value to represent.

forKnownType

public static CloudObject forKnownType(java.lang.Object value)

Constructs a CloudObject representing the given value of a well-known cloud object type.

Parameters:

value - the scalar value to represent.

Throws:

java.lang.RuntimeException - if the value does not have a CloudKnownType mapping

getClassName

public java.lang.String getClassName()

Gets the name of the Java class that this CloudObject represents.

clone

public CloudObject clone()

Overrides:

clone in class com.google.api.client.json.GenericJson