Package org.apache.calcite.avatica.remote

Class JsonHandler

java.lang.Object

org.apache.calcite.avatica.remote.AbstractHandler<String>

org.apache.calcite.avatica.remote.JsonHandler

All Implemented Interfaces:

Handler<String>

public class JsonHandler
extends AbstractHandler<String>

Implementation of Handler that decodes JSON requests, sends them to a Service, and encodes the responses into JSON.

See Also:

• JsonService

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.avatica.remote.Handler

Handler.HandlerResponse<T>

Field Summary

Fields

Modifier and Type	Field	Description
protected static final com.fasterxml.jackson.databind.ObjectMapper	MAPPER

Fields inherited from class org.apache.calcite.avatica.remote.AbstractHandler

service

Fields inherited from interface org.apache.calcite.avatica.remote.Handler

HANDLER_SERIALIZATION_METRICS_NAME, HTTP_INTERNAL_SERVER_ERROR, HTTP_OK, HTTP_UNAUTHENTICATED, HTTP_UNAUTHORIZED

Constructor Summary

Constructors

Constructor	Description
JsonHandler(Service service, org.apache.calcite.avatica.metrics.MetricsSystem metrics)

Method Summary

Modifier and Type	Method	Description
Handler.HandlerResponse<String>	apply(String jsonRequest)	Compute a response for the given request, handling errors generated by that computation.

Methods inherited from class org.apache.calcite.avatica.remote.AbstractHandler

convertToErrorResponse, setRpcMetadata, unauthenticatedErrorResponse, unauthorizedErrorResponse

Methods inherited from class java.lang.Object

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

Field Details

MAPPER

protected static final com.fasterxml.jackson.databind.ObjectMapper MAPPER

Constructor Details

JsonHandler

public JsonHandler(Service service,
 org.apache.calcite.avatica.metrics.MetricsSystem metrics)

Method Details

apply

public Handler.HandlerResponse<String> apply(String jsonRequest)

Description copied from class: AbstractHandler

Compute a response for the given request, handling errors generated by that computation.

Specified by:

apply in interface Handler<String>

Overrides:

apply in class AbstractHandler<String>

Parameters:

jsonRequest - The caller's request.

Returns:

A Service.Response with additional context about that response.