```
public interface EntityRequestHandler
```
Handles the URL/request processing for an entity in a central location

Author:

Aaron Zeckoski (aaron@caret.cam.ac.uk)

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`BATCH`	The reserved word used to trigger batch operations
`static String`	`COMPENSATE_METHOD`	This is the special indicator used to denote that POST should be translated to a PUT or DELETE in order to compensate for browser limitations, Example: /people/1?
`static String`	`DESCRIBE`	The reserved word used to trigger entity descriptions
`static String`	`FAKE_ID`	The id used in generated URLs
`static String`	`HEADER_ENTITY_ID`	This is the name of the header which will contain the id of newly created entities
`static String`	`HEADER_ENTITY_REFERENCE`	This is the name of the header which will contain the reference of created/updated entities
`static String`	`HEADER_ENTITY_URL`	This is the name of the header that will contain created/updated entities SHOW URL
`static String`	`SLASH_BATCH`
`static String`	`SLASH_DESCRIBE`

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`handleEntityAccess(HttpServletRequest req, HttpServletResponse res, String path)`	Handles the servlet request response cycle for all direct servlet accesses, logically, we only want to let this request continue on if the entity exists AND there is an http access provider to handle it AND the user can access it (there is some auth completed already or no auth is required)
`String`	`handleEntityError(HttpServletRequest req, Throwable error)`	Handles an error which occurs by sending an email and logging extra info about the failure

- Field Detail
  - DESCRIBE
```
static final String DESCRIBE
```
    The reserved word used to trigger entity descriptions
    
    See Also:
    
    Constant Field Values
  - SLASH_DESCRIBE
```
static final String SLASH_DESCRIBE
```
    See Also:
    
    Constant Field Values
  - BATCH
```
static final String BATCH
```
    The reserved word used to trigger batch operations
    
    See Also:
    
    Constant Field Values
  - SLASH_BATCH
```
static final String SLASH_BATCH
```
    See Also:
    
    Constant Field Values
  - HEADER_ENTITY_ID
```
static final String HEADER_ENTITY_ID
```
    This is the name of the header which will contain the id of newly created entities
    
    See Also:
    
    Constant Field Values
  - HEADER_ENTITY_REFERENCE
```
static final String HEADER_ENTITY_REFERENCE
```
    This is the name of the header which will contain the reference of created/updated entities
    
    See Also:
    
    Constant Field Values
  - HEADER_ENTITY_URL
```
static final String HEADER_ENTITY_URL
```
    This is the name of the header that will contain created/updated entities SHOW URL
    
    See Also:
    
    Constant Field Values
  - FAKE_ID
```
static final String FAKE_ID
```
    The id used in generated URLs
    
    See Also:
    
    Constant Field Values
  - COMPENSATE_METHOD
```
static final String COMPENSATE_METHOD
```
    This is the special indicator used to denote that POST should be translated to a PUT or DELETE in order to compensate for browser limitations, Example: /people/1?_method=PUT
    
    See Also:
    
    Constant Field Values
- Method Detail
  - handleEntityAccess
```
String handleEntityAccess(HttpServletRequest req,
                          HttpServletResponse res,
                          String path)
```
    Handles the servlet request response cycle for all direct servlet accesses, logically, we only want to let this request continue on if the entity exists AND there is an http access provider to handle it AND the user can access it (there is some auth completed already or no auth is required)
    
    Parameters:
    
    req - the servlet request
    
    res - the servlet response
    
    path - the path from the request (if null it will be generated from the req)
    
    Returns:
    
    the entity reference that was handled as part of this request
    
    Throws:
    
    EntityException - if entity could not be found or failure parsing
  - handleEntityError
```
String handleEntityError(HttpServletRequest req,
                         Throwable error)
```
    Handles an error which occurs by sending an email and logging extra info about the failure
    
    Parameters:
    
    req - the current request
    
    error - the current error that occurred
    
    Returns:
    
    the comprehensive error message

Interface EntityRequestHandler

Field Summary

Method Summary

Field Detail

DESCRIBE

SLASH_DESCRIBE

BATCH

SLASH_BATCH

HEADER_ENTITY_ID

HEADER_ENTITY_REFERENCE

HEADER_ENTITY_URL

FAKE_ID

COMPENSATE_METHOD

Method Detail

handleEntityAccess

handleEntityError