ScriptTemplateConfigurer (Spring Framework 5.2.1.RELEASE API)

java.lang.Object
- org.springframework.web.servlet.view.script.ScriptTemplateConfigurer

All Implemented Interfaces:: ScriptTemplateConfig

public class ScriptTemplateConfigurer
extends Object
implements ScriptTemplateConfig

An implementation of Spring MVC's ScriptTemplateConfig for creating a ScriptEngine for use in a web application.

 // Add the following to an @Configuration class
 @Bean
 public ScriptTemplateConfigurer mustacheConfigurer() {
    ScriptTemplateConfigurer configurer = new ScriptTemplateConfigurer();
    configurer.setEngineName("nashorn");
    configurer.setScripts("mustache.js");
    configurer.setRenderObject("Mustache");
    configurer.setRenderFunction("render");
    return configurer;
 }

NOTE: It is possible to use non thread-safe script engines with templating libraries not designed for concurrency, like Handlebars or React running on Nashorn, by setting the sharedEngine property to false.

Since:: 4.2
Author:: Sebastien Deleuze
See Also:: ScriptTemplateView

Constructor Summary

Constructors
Constructor and Description
`ScriptTemplateConfigurer()` Default constructor.
`ScriptTemplateConfigurer(String engineName)` Create a new ScriptTemplateConfigurer using the given engine name.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Charset`	`getCharset()` Return the charset used to read script and template files.
`String`	`getContentType()` Return the content type to use for the response.
`ScriptEngine`	`getEngine()` Return the `ScriptEngine` to use by the views.
`String`	`getEngineName()` Return the engine name that will be used to instantiate the `ScriptEngine`.
`Supplier<ScriptEngine>`	`getEngineSupplier()` Return the engine supplier that will be used to instantiate the `ScriptEngine`.
`String`	`getRenderFunction()` Return the render function name (optional).
`String`	`getRenderObject()` Return the object where the render function belongs (optional).
`String`	`getResourceLoaderPath()` Return the resource loader path(s) via a Spring resource location.
`String[]`	`getScripts()` Return the scripts to be loaded by the script engine (library or user provided).
`Boolean`	`isSharedEngine()` Return whether to use a shared engine for all threads or whether to create thread-local engine instances for each thread.
`void`	`setCharset(Charset charset)` Set the charset used to read script and template files.
`void`	`setContentType(String contentType)` Set the content type to use for the response.
`void`	`setEngine(ScriptEngine engine)` Set the `ScriptEngine` to use by the view.
`void`	`setEngineName(String engineName)` Set the engine name that will be used to instantiate the `ScriptEngine`.
`void`	`setEngineSupplier(Supplier<ScriptEngine> engineSupplier)` Set the `ScriptEngine` supplier to use by the view, usually used with `setSharedEngine(Boolean)` set to `false`.
`void`	`setRenderFunction(String renderFunction)` Set the render function name (optional).
`void`	`setRenderObject(String renderObject)` Set the object where the render function belongs (optional).
`void`	`setResourceLoaderPath(String resourceLoaderPath)` Set the resource loader path(s) via a Spring resource location.
`void`	`setScripts(String... scriptNames)` Set the scripts to be loaded by the script engine (library or user provided).
`void`	`setSharedEngine(Boolean sharedEngine)` When set to `false`, use thread-local `ScriptEngine` instances instead of one single shared instance.

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

- Constructor Detail
  - ScriptTemplateConfigurer
```
public ScriptTemplateConfigurer()
```
    Default constructor.
  - ScriptTemplateConfigurer
```
public ScriptTemplateConfigurer(String engineName)
```
    Create a new ScriptTemplateConfigurer using the given engine name.
- Method Detail
  - setEngine
```
public void setEngine(@Nullable
                      ScriptEngine engine)
```
    Set the ScriptEngine to use by the view. If renderFunction is specified, the script engine must implement Invocable. You must define engine or engineName, not both.
    When the sharedEngine flag is set to false, you should not specify the script engine with this setter, but with setEngineName(String) or setEngineSupplier(Supplier) since it implies multiple lazy instantiations of the script engine.
    
    See Also:
    
    setEngineName(String), setEngineSupplier(Supplier)
  - getEngine
```
@Nullable
public ScriptEngine getEngine()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the ScriptEngine to use by the views.
    
    Specified by:
    
    getEngine in interface ScriptTemplateConfig
  - setEngineSupplier
```
public void setEngineSupplier(@Nullable
                              Supplier<ScriptEngine> engineSupplier)
```
    Set the ScriptEngine supplier to use by the view, usually used with setSharedEngine(Boolean) set to false. If renderFunction is specified, the script engine must implement Invocable. You must either define engineSupplier, engine or engineName.
    
    Since:
    
    5.2
    
    See Also:
    
    setEngine(ScriptEngine), setEngineName(String)
  - getEngineSupplier
```
@Nullable
public Supplier<ScriptEngine> getEngineSupplier()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the engine supplier that will be used to instantiate the ScriptEngine.
    
    Specified by:
    
    getEngineSupplier in interface ScriptTemplateConfig
  - setEngineName
```
public void setEngineName(@Nullable
                          String engineName)
```
    Set the engine name that will be used to instantiate the ScriptEngine. If renderFunction is specified, the script engine must implement Invocable. You must define engine or engineName, not both.
    
    See Also:
    
    setEngine(ScriptEngine), setEngineSupplier(Supplier)
  - getEngineName
```
@Nullable
public String getEngineName()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the engine name that will be used to instantiate the ScriptEngine.
    
    Specified by:
    
    getEngineName in interface ScriptTemplateConfig
  - setSharedEngine
```
public void setSharedEngine(@Nullable
                            Boolean sharedEngine)
```
    When set to false, use thread-local ScriptEngine instances instead of one single shared instance. This flag should be set to false for those using non thread-safe script engines with templating libraries not designed for concurrency, like Handlebars or React running on Nashorn for example.
    When this flag is set to false, the script engine must be specified using setEngineName(String) or setEngineSupplier(Supplier). Using setEngine(ScriptEngine) is not possible because multiple instances of the script engine need to be created lazily (one per thread).
    
    See Also:
    
    THREADING ScriptEngine parameter
  - isSharedEngine
```
@Nullable
public Boolean isSharedEngine()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return whether to use a shared engine for all threads or whether to create thread-local engine instances for each thread.
    
    Specified by:
    
    isSharedEngine in interface ScriptTemplateConfig
  - setScripts
```
public void setScripts(@Nullable
                       String... scriptNames)
```
    Set the scripts to be loaded by the script engine (library or user provided). Since resourceLoaderPath default value is "classpath:", you can load easily any script available on the classpath.
    For example, in order to use a JavaScript library available as a WebJars dependency and a custom "render.js" file, you should call configurer.setScripts("/META-INF/resources/webjars/library/version/library.js", "com/myproject/script/render.js");.
    
    See Also:
    
    setResourceLoaderPath(java.lang.String), WebJars
  - getScripts
```
@Nullable
public String[] getScripts()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the scripts to be loaded by the script engine (library or user provided).
    
    Specified by:
    
    getScripts in interface ScriptTemplateConfig
  - setRenderObject
```
public void setRenderObject(@Nullable
                            String renderObject)
```
    Set the object where the render function belongs (optional). For example, in order to call Mustache.render(), renderObject should be set to "Mustache" and renderFunction to "render".
  - getRenderObject
```
@Nullable
public String getRenderObject()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the object where the render function belongs (optional).
    
    Specified by:
    
    getRenderObject in interface ScriptTemplateConfig
  - setRenderFunction
```
public void setRenderFunction(@Nullable
                              String renderFunction)
```
    Set the render function name (optional). If not specified, the script templates will be evaluated with ScriptEngine.eval(String, Bindings).
    This function will be called with the following parameters:
    1. String template: the template content
    2. Map model: the view model
    3. RenderingContext context: the rendering context (since 5.0)
    See Also:
    
    RenderingContext
  - getRenderFunction
```
@Nullable
public String getRenderFunction()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the render function name (optional). If not specified, the script templates will be evaluated with ScriptEngine.eval(String, Bindings).
    
    Specified by:
    
    getRenderFunction in interface ScriptTemplateConfig
  - setContentType
```
public void setContentType(@Nullable
                           String contentType)
```
    Set the content type to use for the response. (text/html by default).
    
    Since:
    
    4.2.1
  - getContentType
```
@Nullable
public String getContentType()
```
    Return the content type to use for the response.
    
    Specified by:
    
    getContentType in interface ScriptTemplateConfig
    
    Since:
    
    4.2.1
  - setCharset
```
public void setCharset(@Nullable
                       Charset charset)
```
    Set the charset used to read script and template files. (UTF-8 by default).
  - getCharset
```
@Nullable
public Charset getCharset()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the charset used to read script and template files.
    
    Specified by:
    
    getCharset in interface ScriptTemplateConfig
  - setResourceLoaderPath
```
public void setResourceLoaderPath(@Nullable
                                  String resourceLoaderPath)
```
    Set the resource loader path(s) via a Spring resource location. Accepts multiple locations as a comma-separated list of paths. Standard URLs like "file:" and "classpath:" and pseudo URLs are supported as understood by Spring's ResourceLoader. Relative paths are allowed when running in an ApplicationContext.
    Default is "classpath:".
  - getResourceLoaderPath
```
@Nullable
public String getResourceLoaderPath()
```
    Description copied from interface: ScriptTemplateConfig
    
    Return the resource loader path(s) via a Spring resource location.
    
    Specified by:
    
    getResourceLoaderPath in interface ScriptTemplateConfig

Class ScriptTemplateConfigurer

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ScriptTemplateConfigurer

ScriptTemplateConfigurer

Method Detail

setEngine

getEngine

setEngineSupplier

getEngineSupplier

setEngineName

getEngineName

setSharedEngine

isSharedEngine

setScripts

getScripts

setRenderObject

getRenderObject

setRenderFunction

getRenderFunction

setContentType

getContentType

setCharset

getCharset

setResourceLoaderPath

getResourceLoaderPath