InvocationHandler.Builder (Helidon Project 2.6.9 API)

java.lang.Object
- io.helidon.graphql.server.InvocationHandler.Builder

All Implemented Interfaces:

Builder<InvocationHandler>, Supplier<InvocationHandler>

Enclosing interface:

InvocationHandler
```
public static class InvocationHandler.Builder
extends Object
implements Builder<InvocationHandler>
```
Fluent API builder to configure the invocation handler.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`InvocationHandler.Builder`	`addBlacklistedException(String exceptionClass)`	Add an exception to the blacklist.
`InvocationHandler.Builder`	`addWhitelistedException(String exceptionClass)`	Add an exception to the whitelist.
`InvocationHandler`	`build()`	Build the instance from this builder.
`InvocationHandler.Builder`	`config(Config config)`	Update builder from configuration.
`InvocationHandler.Builder`	`defaultErrorMessage(String defaultErrorMessage)`	Default error message to return when an internal server error occurs.
`InvocationHandler.Builder`	`exceptionBlacklist(String[] classNames)`	Blacklisted error classes that will not return error message back to caller.
`InvocationHandler.Builder`	`exceptionWhitelist(String[] classNames)`	Whitelisted error classes that will return error message back to caller.
`InvocationHandler.Builder`	`schema(graphql.schema.GraphQLSchema schema)`	Configure the GraphQL schema to be used.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.helidon.common.Builder
get

Method Detail

build
```
public InvocationHandler build()
```
Description copied from interface: Builder

Build the instance from this builder.

Specified by:

build in interface Builder<InvocationHandler>

Returns:

instance of the built type

config

public InvocationHandler.Builder config(Config config)

Update builder from configuration. Configuration options:

Optional configuration parameters
key	default value	description
default-error-message	"Server Error"	Error message used for internal errors that are not whitelisted.
exception-white-list		Array of exceptions classes. If an `Error` or a `RuntimeException` of this type is caught, its message will be propagated to the caller.
exception-black-list		Array of exception classes. If a checked `Exception` is called, its message is propagated to the caller, unless it is in the blacklist.

Parameters:: config - configuration to use
Returns:: updated builder instance

schema
```
public InvocationHandler.Builder schema(graphql.schema.GraphQLSchema schema)
```
Configure the GraphQL schema to be used.

Parameters:

schema - schema to handle by this support

Returns:

updated builder instance

defaultErrorMessage
```
public InvocationHandler.Builder defaultErrorMessage(String defaultErrorMessage)
```
Default error message to return when an internal server error occurs.

Parameters:

defaultErrorMessage - default error message

Returns:

updated builder instance

exceptionBlacklist
```
public InvocationHandler.Builder exceptionBlacklist(String[] classNames)
```
Blacklisted error classes that will not return error message back to caller.

Parameters:

classNames - names of classes to deny for checked exceptions

Returns:

updated builder instance

addBlacklistedException
```
public InvocationHandler.Builder addBlacklistedException(String exceptionClass)
```
Add an exception to the blacklist. If a blacklisted exception is thrown, defaultErrorMessage(String) is returned instead.

Parameters:

exceptionClass - exception to blacklist

Returns:

updated builder instance

exceptionWhitelist
```
public InvocationHandler.Builder exceptionWhitelist(String[] classNames)
```
Whitelisted error classes that will return error message back to caller.

Parameters:

classNames - names of classes to allow for runtime exceptions and errors

Returns:

updated builder instance

addWhitelistedException
```
public InvocationHandler.Builder addWhitelistedException(String exceptionClass)
```
Add an exception to the whitelist. If a whitelisted exception is thrown, its message is returned, otherwise defaultErrorMessage(String) is returned.

Parameters:

exceptionClass - exception to whitelist

Returns:

updated builder instance