TransportErrorCode (Lagom Services API)

Object
- com.lightbend.lagom.javadsl.api.transport.TransportErrorCode

All Implemented Interfaces:

Serializable
```
public final class TransportErrorCode
extends Object
implements Serializable
```
An error code that gets translated into an appropriate underlying error code.
This attempts to match up corresponding HTTP error codes with WebSocket close codes, so that user code can generically select a code without worrying about the underlying transport.
While most WebSocket close codes that we typically use do have a corresponding HTTP error code, there are many HTTP error codes that don't have a corresponding WebSocket close code. In these cases, we use the private WebSocket close code range (4xxx), with the HTTP error code as the last three digits. Such WebSocket close codes will be in the range 4400 to 4599.
This class should only be used to represent error codes, status codes like HTTP 200 should not be represented using this class. This is enforced for HTTP codes, since they have a well defined categorisation, codes between 400 and 599 are considered errors. It is however not enforced for WebSockets, since the WebSocket protocol defines no such categorisation of codes, it specifies a number of well known codes from 1000 to 1015, with no particular pattern to their meaning, and the remaining codes are only categorised by whether they are private, reserved for the WebSocket spec, or reserved for applications to specify.
For WebSocket close codes that are not known, or are not in the private range of 4400 to 4599 defined by us, this use class uses the generic HTTP 404 error code.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static TransportErrorCode`	`BadRequest` A bad request, most often this will be equivalent to unsupported data.
`static TransportErrorCode`	`Forbidden` A particular operation was forbidden.
`static TransportErrorCode`	`GoingAway` Going away, thrown when the service is unavailable or going away.
`static TransportErrorCode`	`InternalServerError` An internal server error, equivalent to Unexpected Condition.
`static TransportErrorCode`	`MethodNotAllowed` The method being used is not allowed.
`static TransportErrorCode`	`NotAcceptable` The server can't generate a response that meets the clients accepted response types.
`static TransportErrorCode`	`NotFound` A resource was not found, equivalent to policy violation.
`static TransportErrorCode`	`PayloadTooLarge` The payload of a message is too large.
`static TransportErrorCode`	`PolicyViolation` A generic error to used to indicate that the end receiving the error message violated the remote ends policy.
`static TransportErrorCode`	`ProtocolError` A protocol error, or bad request.
`static TransportErrorCode`	`ServiceUnavailable` Service unavailable, thrown when the service is unavailable or going away.
`static TransportErrorCode`	`UnexpectedCondition` A generic error used to indicate that the end sending the error message because it encountered an unexpected condition.
`static TransportErrorCode`	`UnsupportedData` An application level protocol error, such as when a client or server sent data that can't be deserialized.
`static TransportErrorCode`	`UnsupportedMediaType` The client or server doesn't know how to deserialize the request or response.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`description()` A description of this close code.
`boolean`	`equals(Object o)`
`static TransportErrorCode`	`fromHttp(int code)` Get a transport error code from the given HTTP error code.
`static TransportErrorCode`	`fromWebSocket(int code)` Get a transport error code from the given WebSocket close code.
`int`	`hashCode()`
`int`	`http()` The HTTP status code for this error.
`String`	`toString()`
`int`	`webSocket()` The WebSocket close code for this error.

Methods inherited from class Object
getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - ProtocolError
```
public static final TransportErrorCode ProtocolError
```
    A protocol error, or bad request.
  - UnsupportedData
```
public static final TransportErrorCode UnsupportedData
```
    An application level protocol error, such as when a client or server sent data that can't be deserialized.
  - BadRequest
```
public static final TransportErrorCode BadRequest
```
    A bad request, most often this will be equivalent to unsupported data.
  - Forbidden
```
public static final TransportErrorCode Forbidden
```
    A particular operation was forbidden.
  - PolicyViolation
```
public static final TransportErrorCode PolicyViolation
```
    A generic error to used to indicate that the end receiving the error message violated the remote ends policy.
  - NotFound
```
public static final TransportErrorCode NotFound
```
    A resource was not found, equivalent to policy violation.
  - MethodNotAllowed
```
public static final TransportErrorCode MethodNotAllowed
```
    The method being used is not allowed.
  - NotAcceptable
```
public static final TransportErrorCode NotAcceptable
```
    The server can't generate a response that meets the clients accepted response types.
  - PayloadTooLarge
```
public static final TransportErrorCode PayloadTooLarge
```
    The payload of a message is too large.
  - UnsupportedMediaType
```
public static final TransportErrorCode UnsupportedMediaType
```
    The client or server doesn't know how to deserialize the request or response.
  - UnexpectedCondition
```
public static final TransportErrorCode UnexpectedCondition
```
    A generic error used to indicate that the end sending the error message because it encountered an unexpected condition.
  - InternalServerError
```
public static final TransportErrorCode InternalServerError
```
    An internal server error, equivalent to Unexpected Condition.
  - ServiceUnavailable
```
public static final TransportErrorCode ServiceUnavailable
```
    Service unavailable, thrown when the service is unavailable or going away.
  - GoingAway
```
public static final TransportErrorCode GoingAway
```
    Going away, thrown when the service is unavailable or going away.
- Method Detail
  - fromHttp
```
public static TransportErrorCode fromHttp(int code)
```
    Get a transport error code from the given HTTP error code.
    
    Parameters:
    
    code - The HTTP error code, must be between 400 and 599 inclusive.
    
    Returns:
    
    The transport error code.
    
    Throws:
    
    IllegalArgumentException - if the HTTP code was not between 400 and 599.
  - fromWebSocket
```
public static TransportErrorCode fromWebSocket(int code)
```
    Get a transport error code from the given WebSocket close code.
    
    Parameters:
    
    code - The WebSocket close code, must be between 0 and 65535 inclusive.
    
    Returns:
    
    The transport error code.
    
    Throws:
    
    IllegalArgumentException - if the code is not an unsigned 2 byte integer.
  - http
```
public int http()
```
    The HTTP status code for this error.
    
    Returns:
    
    A value between 400 and 599.
  - webSocket
```
public int webSocket()
```
    The WebSocket close code for this error.
    
    Returns:
    
    A value from 0 to 65535.
  - description
```
public String description()
```
    A description of this close code.
    This description will be meaningful for known built in close codes, but for other codes, it will be "Unknown error code".
    
    Returns:
    
    A description of this closed code.
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class TransportErrorCode

Field Summary

Method Summary

Methods inherited from class Object

Field Detail

ProtocolError

UnsupportedData

BadRequest

Forbidden

PolicyViolation

NotFound

MethodNotAllowed

NotAcceptable

PayloadTooLarge

UnsupportedMediaType

UnexpectedCondition

InternalServerError

ServiceUnavailable

GoingAway

Method Detail

fromHttp

fromWebSocket

http

webSocket

description

equals

hashCode

toString