java.lang.Object
- io.inversion.Engine

```
public class Engine
extends java.lang.Object
```
Matches inbound Request Url paths to an Api Endpoint and executes associated Actions.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static interface Engine.EngineListener
Receives Engine and Api lifecycle, per request and per error callback notifications.

Field Summary

Fields
Modifier and Type	Field	Description
`protected java.util.List<Api>`	`apis`	The `Api`s being service by this Engine
`protected io.inversion.config.Config`	`config`
`protected java.lang.String`	`configPath`	Optional override for the configPath sys/env prop used by Config to locate configuration property files
`protected java.lang.String`	`configProfile`	Optional override for the sys/env prop used by Config to determine which profile specific configuration property files to load
`protected io.inversion.context.Context`	`context`
`protected java.lang.String`	`corsAllowHeaders`	Base value for the CORS "Access-Control-Allow-Headers" response header.
`protected java.util.List<Action>`	`filters`
`protected Response`	`lastResponse`	The last `Response` served by this Engine, primarily used for writing test cases.
`protected java.util.List<Engine.EngineListener>`	`listeners`	Listeners that will receive Engine and Api lifecycle, request, and error callbacks.
`protected org.slf4j.Logger`	`log`

Constructor Summary

Constructors
Constructor Description

Engine()

Engine(Api... apis)

Engine(java.lang.String configPath, java.lang.String configProfile)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`autowire(io.inversion.context.Context context)`
`static io.inversion.json.JSNode`	`buildErrorJson(java.lang.Throwable ex)`
`Response`	`delete(java.lang.String url)`	Convenience overloading of `#service(Request, Response)` to run a REST DELETE Request on this Engine.
`Response`	`delete(java.lang.String url, io.inversion.json.JSList hrefs)`	Convenience overloading of `#service(Request, Response)` to run a REST DELETE Request on this Engine.
`protected static void`	`exclude(io.inversion.json.JSMap node, java.util.Set<java.lang.String> includes, java.util.Set<java.lang.String> excludes, java.lang.String path)`
`protected static void`	`exclude(Request req, Response res)`
`protected static boolean`	`exclude(java.lang.String path, java.util.Set<java.lang.String> includes, java.util.Set<java.lang.String> excludes)`
`protected static boolean`	`find(java.util.Collection<java.lang.String> paths, java.lang.String path, boolean matchStart)`
`Response`	`get(java.lang.String url)`	Convenience overloading of `#service(Request, Response)` to run a REST GET Request on this Engine.
`Response`	`get(java.lang.String url, java.util.List queryTerms)`	Convenience overloading of `#service(Request, Response)` to run a REST GET Request on this Engine.
`Response`	`get(java.lang.String url, java.util.Map<java.lang.String,java.lang.String> params)`	Convenience overloading of `#service(Request, Response)` to run a REST GET Request on this Engine.
`Api`	`getApi(java.lang.String apiName)`
`java.util.List<Api>`	`getApis()`
`io.inversion.config.Config`	`getConfig()`
`java.lang.String`	`getConfigPath()`
`java.lang.String`	`getConfigProfile()`
`io.inversion.context.Context`	`getContext()`
`java.util.List<Action>`	`getFilters()`
`Response`	`getLastResponse()`
`java.net.URL`	`getResource(java.lang.String name)`
`boolean`	`isStarted()`
`boolean`	`matchApi(Request req)`
`Response`	`patch(java.lang.String url, io.inversion.json.JSNode body)`	Convenience overloading of `#service(Request, Response)` to run a REST PATCH Request on this Engine.
`Response`	`post(java.lang.String url, io.inversion.json.JSNode body)`	Convenience overloading of `#service(Request, Response)` to run a REST POST Request on this Engine.
`Response`	`put(java.lang.String url, io.inversion.json.JSNode body)`	Convenience overloading of `#service(Request, Response)` to run a REST PUT Request on this Engine.
`void`	`removeApi(Api api)`	Removes the api, notifies EngineListeners and calls api.shutdown().
`Chain`	`service(Request req, Response res)`	The main entry point for processing a Request and generating Response content.
`Response`	`service(java.lang.String method, java.lang.String url)`	Convenience overloading of `#service(Request, Response)`
`Response`	`service(java.lang.String method, java.lang.String url, java.lang.String body)`	Convenience overloading of `#service(Request, Response)`
`Response`	`service(java.lang.String method, java.lang.String url, java.lang.String body, java.util.Map<java.lang.String,java.lang.String> params)`	Convenience overloading of `#service(Request, Response)`
`void`	`shutdown()`	Removes all Apis and notifies listeners.onShutdown
`protected void`	`shutdownApi(Api api)`
`Engine`	`startup()`	Runs the `Wirer` and calls `startupApi` for each Api.
`protected void`	`startup0()`	Convenient pre-startup hook for subclasses guaranteed to only be called once.
`protected void`	`startupApi(Api api)`
`Engine`	`withAllowHeaders(java.lang.String allowHeaders)`
`Engine`	`withApi(Api api)`
`Engine`	`withConfig(io.inversion.config.Config config)`
`Engine`	`withConfigPath(java.lang.String configPath)`
`Engine`	`withConfigProfile(java.lang.String configProfile)`
`Engine`	`withContext(io.inversion.context.Context context)`
`Engine`	`withEngineListener(Engine.EngineListener listener)`	Registers `listener` to receive Engine, Api, request and error callbacks.
`Engine`	`withFilters(Action... filters)`

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

- Field Detail
  - log
```
protected final transient org.slf4j.Logger log
```
  - configPath
```
protected transient java.lang.String configPath
```
    Optional override for the configPath sys/env prop used by Config to locate configuration property files
  - configProfile
```
protected transient java.lang.String configProfile
```
    Optional override for the sys/env prop used by Config to determine which profile specific configuration property files to load
  - context
```
protected transient io.inversion.context.Context context
```
  - config
```
protected transient io.inversion.config.Config config
```
  - listeners
```
protected final transient java.util.List<Engine.EngineListener> listeners
```
    Listeners that will receive Engine and Api lifecycle, request, and error callbacks.
  - lastResponse
```
protected transient volatile Response lastResponse
```
    The last Response served by this Engine, primarily used for writing test cases.
  - apis
```
protected java.util.List<Api> apis
```
    The Apis being service by this Engine
  - filters
```
protected final java.util.List<Action> filters
```
  - corsAllowHeaders
```
protected java.lang.String corsAllowHeaders
```
    Base value for the CORS "Access-Control-Allow-Headers" response header.
    Values from the request "Access-Control-Request-Header" header are concatenated to this resulting in the final value of "Access-Control-Allow-Headers" sent in the response.
    Unless you are really doing something specific with browser security you probably won't need to customize this list.
- Constructor Detail
  - Engine
```
public Engine()
```
  - Engine
```
public Engine(java.lang.String configPath,
              java.lang.String configProfile)
```
  - Engine
```
public Engine(Api... apis)
```
- Method Detail
  - startup0
```
protected void startup0()
```
    Convenient pre-startup hook for subclasses guaranteed to only be called once.
    Called after starting has been set to true but before the Wirer is run or any Apis have been started.
  - startup
```
public Engine startup()
```
    Runs the Wirer and calls startupApi for each Api.
    An Engine can only be started once. Any calls to startup after the initial call will not have any affect.
    
    Returns:
    
    this Engine
  - shutdown
```
public void shutdown()
```
    Removes all Apis and notifies listeners.onShutdown
  - get
```
public Response get(java.lang.String url)
```
    Convenience overloading of #service(Request, Response) to run a REST GET Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    GET requests for a specific resource should return 200 of 404. GET requests with query string search conditions should return 200 even if the search did not yield any results.
    
    Parameters:
    
    url - the url that will be serviced by this Engine
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - get
```
public Response get(java.lang.String url,
                    java.util.Map<java.lang.String,java.lang.String> params)
```
    Convenience overloading of #service(Request, Response) to run a REST GET Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    GET requests for a specific resource should return 200 of 404. GET requests with query string search conditions should return 200 even if the search did not yield any results.
    
    Parameters:
    
    url - the url that will be serviced by this Engine
    
    params - additional key/value pairs to add to the url query string
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - get
```
public Response get(java.lang.String url,
                    java.util.List queryTerms)
```
    Convenience overloading of #service(Request, Response) to run a REST GET Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    GET requests for a specific resource should return 200 of 404. GET requests with query string search conditions should return 200 even if the search did not yield any results.
    
    Parameters:
    
    url - the url that will be serviced by this Engine
    
    queryTerms - additional keys (no values) to add to the url query string
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - post
```
public Response post(java.lang.String url,
                     io.inversion.json.JSNode body)
```
    Convenience overloading of #service(Request, Response) to run a REST POST Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    Successful POSTs that create a new resource should return a 201.
    
    Parameters:
    
    url - the url that will be serviced by this Engine
    
    body - the JSON body to POST which will be stringified first
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - put
```
public Response put(java.lang.String url,
                    io.inversion.json.JSNode body)
```
    Convenience overloading of #service(Request, Response) to run a REST PUT Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    Successful PUTs that update an existing resource should return a 204. If the PUT references a resource that does not exist, a 404 will be returned.
    
    Parameters:
    
    url - the url that will be serviced by this Engine
    
    body - the JSON body to POST which will be stringified first
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - patch
```
public Response patch(java.lang.String url,
                      io.inversion.json.JSNode body)
```
    Convenience overloading of #service(Request, Response) to run a REST PATCH Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    Successful PATCHes that update an existing resource should return a 204. If the PATCH references a resource that does not exist, a 404 will be returned.
    
    Parameters:
    
    url - the url for a specific resource that should be PATCHed that will be serviced by this Engine
    
    body - the JSON body to POST which will be stringified first
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - delete
```
public Response delete(java.lang.String url)
```
    Convenience overloading of #service(Request, Response) to run a REST DELETE Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    
    Parameters:
    
    url - the url of the resource to be DELETED
    
    Returns:
    
    the Response generated by handling the Request with status 204 if the delete was successful or 404 if the resource was not found
    
    See Also:
    
    service(Request, Response)
  - delete
```
public Response delete(java.lang.String url,
                       io.inversion.json.JSList hrefs)
```
    Convenience overloading of #service(Request, Response) to run a REST DELETE Request on this Engine.
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    
    Parameters:
    
    url - the url of the resource to be DELETED
    
    hrefs - the hrefs of the resource to delete
    
    Returns:
    
    the Response generated by handling the Request with status 204 if the delete was successful or 404 if the resource was not found
    
    See Also:
    
    service(Request, Response)
  - service
```
public Response service(java.lang.String method,
                        java.lang.String url)
```
    Convenience overloading of #service(Request, Response)
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    
    Parameters:
    
    method - the http method of the requested operation
    
    url - the url that will be serviced by this Engine
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - service
```
public Response service(java.lang.String method,
                        java.lang.String url,
                        java.lang.String body)
```
    Convenience overloading of #service(Request, Response)
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    
    Parameters:
    
    method - the http method of the requested operation
    
    url - the url that will be serviced by this Engine.
    
    body - a stringified JSON body presumably to PUT/POST/PATCH
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - service
```
public Response service(java.lang.String method,
                        java.lang.String url,
                        java.lang.String body,
                        java.util.Map<java.lang.String,java.lang.String> params)
```
    Convenience overloading of #service(Request, Response)
    IMPORTANT: This method does not make an external HTTP request, it runs the request on this Engine. If you want to make an external HTTP request see io.inversion.ApiClient.
    
    Parameters:
    
    method - the http method of the requested operation
    
    url - the url that will be serviced by this Engine.
    
    body - a stringified JSON body presumably to PUT/POST/PATCH
    
    params - additional key/value pairs to add to the url query string
    
    Returns:
    
    the Response generated by handling the Request
    
    See Also:
    
    service(Request, Response)
  - service
```
public Chain service(Request req,
                     Response res)
```
    The main entry point for processing a Request and generating Response content.
    This method is designed to be called by integrating runtimes such as EngineServlet or by Actions that need to make recursive calls to the Engine when performing composite operations.
    The host and port component of the Request url are ignored assuming that this Engine instance is supposed to be servicing the request. The url does not have to start with "http[s]://". If it does not, urls that start with "/" or not are handled the same.
    All of the following would be processed the same way:
    
    https://library.com/v1/library/books?ISBN=1234567890
    https://library.com:8080/v1/library/books?ISBN=1234567890
    https://localhost/v1/library/books?ISBN=1234567890
    /v1/library/books?ISBN=1234567890
    v1/library/books?ISBN=1234567890
    Parameters:
    
    req - the api Request
    
    res - the api Response
    
    Returns:
    
    the Chain representing all of the actions executed in populating the Response
  - matchApi
```
public boolean matchApi(Request req)
```
  - buildErrorJson
```
public static io.inversion.json.JSNode buildErrorJson(java.lang.Throwable ex)
```
  - isStarted
```
public boolean isStarted()
```
  - withEngineListener
```
public Engine withEngineListener(Engine.EngineListener listener)
```
    Registers listener to receive Engine, Api, request and error callbacks.
    
    Parameters:
    
    listener - the listener to add
    
    Returns:
    
    this
  - getApis
```
public java.util.List<Api> getApis()
```
  - getApi
```
public Api getApi(java.lang.String apiName)
```
  - withApi
```
public Engine withApi(Api api)
```
  - startupApi
```
protected void startupApi(Api api)
```
  - removeApi
```
public void removeApi(Api api)
```
    Removes the api, notifies EngineListeners and calls api.shutdown().
    
    Parameters:
    
    api - the api to be removed
  - shutdownApi
```
protected void shutdownApi(Api api)
```
  - withAllowHeaders
```
public Engine withAllowHeaders(java.lang.String allowHeaders)
```
  - getLastResponse
```
public Response getLastResponse()
```
    Returns:
    
    the last response serviced by this Engine.
  - getResource
```
public java.net.URL getResource(java.lang.String name)
```
  - getConfigPath
```
public java.lang.String getConfigPath()
```
  - withConfigPath
```
public Engine withConfigPath(java.lang.String configPath)
```
  - getConfigProfile
```
public java.lang.String getConfigProfile()
```
  - withConfigProfile
```
public Engine withConfigProfile(java.lang.String configProfile)
```
  - getConfig
```
public io.inversion.config.Config getConfig()
```
  - withConfig
```
public Engine withConfig(io.inversion.config.Config config)
```
  - getContext
```
public io.inversion.context.Context getContext()
```
  - withContext
```
public Engine withContext(io.inversion.context.Context context)
```
  - withFilters
```
public Engine withFilters(Action... filters)
```
  - getFilters
```
public java.util.List<Action> getFilters()
```
  - exclude
```
protected static void exclude(Request req,
                              Response res)
```
  - exclude
```
protected static void exclude(io.inversion.json.JSMap node,
                              java.util.Set<java.lang.String> includes,
                              java.util.Set<java.lang.String> excludes,
                              java.lang.String path)
```
  - exclude
```
protected static boolean exclude(java.lang.String path,
                                 java.util.Set<java.lang.String> includes,
                                 java.util.Set<java.lang.String> excludes)
```
  - find
```
protected static boolean find(java.util.Collection<java.lang.String> paths,
                              java.lang.String path,
                              boolean matchStart)
```
  - autowire
```
protected void autowire(io.inversion.context.Context context)
```

Constructor	Description
`Engine()`
`Engine(Api... apis)`
`Engine(java.lang.String configPath, java.lang.String configProfile)`

Class Engine

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

log

configPath

configProfile

context

config

listeners

lastResponse

apis

filters

corsAllowHeaders

Constructor Detail

Engine

Engine

Engine

Method Detail

startup0

startup

shutdown

get

get

get

post

put

patch

delete

delete

service

service

service

service

matchApi

buildErrorJson

isStarted

withEngineListener

getApis

getApi

withApi

startupApi

removeApi

shutdownApi

withAllowHeaders

getLastResponse

getResource

getConfigPath

withConfigPath

getConfigProfile

withConfigProfile

getConfig

withConfig

getContext

withContext

withFilters

getFilters

exclude

exclude

exclude

find

autowire