Package org.apache.jasper.compiler
Class JspRuntimeContext
- java.lang.Object
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- org.apache.jasper.compiler.JspRuntimeContext
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- All Implemented Interfaces:
Runnable
public final class JspRuntimeContext extends Object implements Runnable
Class for tracking JSP compile time file dependencies when the &060;%@include file="..."%&062; directive is used. A background thread periodically checks the files a JSP page is dependent upon. If a dpendent file changes the JSP page which included it is recompiled. Only used if a web application context is a directory.- Version:
- $Revision: 1.13 $
- Author:
- Glenn L. Nielsen
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Constructor Summary
Constructors Constructor Description JspRuntimeContext(javax.servlet.ServletContext context, Options options)
Create a JspRuntimeContext for a web application context.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addWrapper(String jspUri, JspServletWrapper jsw)
Add a new JspServletWrapper.void
adjustBytecodeTime(String name, long reference)
void
destroy()
Process a "destory" event for this web application context.byte[]
getBytecode(String name)
Retrieve the bytecode associated with the classlong
getBytecodeBirthTime(String name)
Retrieve the time the bytecode for a class was createdMap<String,byte[]>
getBytecodes()
Get the class-name to bytecode mapString
getClassPath()
The classpath that is passed off to the Java compiler.CodeSource
getCodeSource()
Get the SecurityManager Policy CodeSource for this web applicaiton context.int
getJspCount()
Returns the number of JSPs for which JspServletWrappers exist, i.e., the number of JSPs that have been loaded into the webapp.int
getJspReloadCount()
Gets the current value of the JSP reload counter.Map<String,Map<String,JavaFileObject>>
getPackageMap()
The packageMap keeps track of the bytecode files in a package generated by a java compiler.ClassLoader
getParentClassLoader()
Get the parent class loader.PermissionCollection
getPermissionCollection()
Get the SecurityManager PermissionCollection for this web application context.JspServletWrapper
getWrapper(String jspUri)
Get an already existing JspServletWrapper.void
incrementJspReloadCount()
Increments the JSP reload counter.void
removeWrapper(String jspUri)
Remove a JspServletWrapper.void
run()
The background thread that checks for changes to files included by a JSP and flags that a recompile is required.void
saveBytecode(String className, String classFileName)
Save the bytecode for a class to disk.void
setBytecode(String name, byte[] bytecode)
Save the bytecode for the class in a map.void
setJspReloadCount(int count)
Resets the JSP reload counter.protected void
threadSleep()
Sleep for the duration specified by thecheckInterval
property.protected void
threadStart()
Start the background thread that will periodically check for changes to compile time included files in a JSP.protected void
threadStop()
Stop the background thread that is periodically checking for changes to compile time included files in a JSP.
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Constructor Detail
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JspRuntimeContext
public JspRuntimeContext(javax.servlet.ServletContext context, Options options)
Create a JspRuntimeContext for a web application context. Loads in any previously generated dependencies from file.- Parameters:
context
- ServletContext for web application
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Method Detail
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addWrapper
public void addWrapper(String jspUri, JspServletWrapper jsw)
Add a new JspServletWrapper.- Parameters:
jspUri
- JSP URIjsw
- Servlet wrapper for JSP
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getWrapper
public JspServletWrapper getWrapper(String jspUri)
Get an already existing JspServletWrapper.- Parameters:
jspUri
- JSP URI- Returns:
- JspServletWrapper for JSP
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removeWrapper
public void removeWrapper(String jspUri)
Remove a JspServletWrapper.- Parameters:
jspUri
- JSP URI of JspServletWrapper to remove
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getJspCount
public int getJspCount()
Returns the number of JSPs for which JspServletWrappers exist, i.e., the number of JSPs that have been loaded into the webapp.- Returns:
- The number of JSPs that have been loaded into the webapp
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getCodeSource
public CodeSource getCodeSource()
Get the SecurityManager Policy CodeSource for this web applicaiton context.- Returns:
- CodeSource for JSP
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getParentClassLoader
public ClassLoader getParentClassLoader()
Get the parent class loader.- Returns:
- ClassLoader parent
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getPermissionCollection
public PermissionCollection getPermissionCollection()
Get the SecurityManager PermissionCollection for this web application context.- Returns:
- PermissionCollection permissions
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destroy
public void destroy()
Process a "destory" event for this web application context.
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incrementJspReloadCount
public void incrementJspReloadCount()
Increments the JSP reload counter.
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setJspReloadCount
public void setJspReloadCount(int count)
Resets the JSP reload counter.- Parameters:
count
- Value to which to reset the JSP reload counter
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getJspReloadCount
public int getJspReloadCount()
Gets the current value of the JSP reload counter.- Returns:
- The current value of the JSP reload counter
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setBytecode
public void setBytecode(String name, byte[] bytecode)
Save the bytecode for the class in a map. The current time is noted.- Parameters:
name
- The name of the classbytecode
- The bytecode in byte array
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adjustBytecodeTime
public void adjustBytecodeTime(String name, long reference)
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getBytecode
public byte[] getBytecode(String name)
Retrieve the bytecode associated with the class
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getBytecodeBirthTime
public long getBytecodeBirthTime(String name)
Retrieve the time the bytecode for a class was created
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getPackageMap
public Map<String,Map<String,JavaFileObject>> getPackageMap()
The packageMap keeps track of the bytecode files in a package generated by a java compiler. This is in turn loaded by the java compiler during compilation. This is gets around the fact that JSR199 API does not provide a way for the compiler use current classloader.
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saveBytecode
public void saveBytecode(String className, String classFileName)
Save the bytecode for a class to disk.
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getClassPath
public String getClassPath()
The classpath that is passed off to the Java compiler.
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threadStart
protected void threadStart()
Start the background thread that will periodically check for changes to compile time included files in a JSP.- Throws:
IllegalStateException
- if we should not be starting a background thread now
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threadStop
protected void threadStop()
Stop the background thread that is periodically checking for changes to compile time included files in a JSP.
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threadSleep
protected void threadSleep()
Sleep for the duration specified by thecheckInterval
property.
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