Package org.apache.tomcat.util.compat
Class JreCompat
- java.lang.Object
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- org.apache.tomcat.util.compat.JreCompat
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- Direct Known Subclasses:
Jre12Compat
public class JreCompat extends java.lang.Object
This is the base implementation class for JRE compatibility and provides an implementation based on Java 11. Sub-classes may extend this class and provide alternative implementations for later JRE versions
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Field Summary
Fields Modifier and Type Field Description protected static java.lang.Boolean
canonCachesDisabled
protected static java.lang.Object
canonCachesDisabledLock
protected static java.lang.String
USE_CANON_CACHES_CMD_ARG
protected static java.util.Optional<java.lang.reflect.Field>
useCanonCachesField
protected static java.lang.Object
useCanonCachesFieldLock
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Constructor Summary
Constructors Constructor Description JreCompat()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description <T> T
callAs(javax.security.auth.Subject subject, java.util.concurrent.Callable<T> action)
java.lang.Object
createVirtualThreadBuilder(java.lang.String name)
Create a thread builder for virtual threads using the given name to name the threads.boolean
disableCanonCaches()
Disable the global canonical file cache.protected void
ensureUseCanonCachesFieldIsPopulated()
java.lang.Object
getExecutor(java.lang.Thread thread)
Obtains the executor, if any, used to create the provided thread.static JreCompat
getInstance()
java.net.SocketAddress
getUnixDomainSocketAddress(java.lang.String path)
Return Unix domain socket address for given path.boolean
isCanonCachesDisabled()
static boolean
isGraalAvailable()
static boolean
isJre12Available()
static boolean
isJre16Available()
static boolean
isJre19Available()
static boolean
isJre21Available()
static boolean
isJre22Available()
java.nio.channels.ServerSocketChannel
openUnixDomainServerSocketChannel()
Create server socket channel using the Unix domain socket ProtocolFamily.java.nio.channels.SocketChannel
openUnixDomainSocketChannel()
Create socket channel using the Unix domain socket ProtocolFamily.void
threadBuilderStart(java.lang.Object threadBuilder, java.lang.Runnable command)
Create a thread with the given thread builder and use it to execute the given runnable.
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Field Detail
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USE_CANON_CACHES_CMD_ARG
protected static final java.lang.String USE_CANON_CACHES_CMD_ARG
- See Also:
- Constant Field Values
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canonCachesDisabled
protected static volatile java.lang.Boolean canonCachesDisabled
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canonCachesDisabledLock
protected static final java.lang.Object canonCachesDisabledLock
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useCanonCachesField
protected static volatile java.util.Optional<java.lang.reflect.Field> useCanonCachesField
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useCanonCachesFieldLock
protected static final java.lang.Object useCanonCachesFieldLock
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Method Detail
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getInstance
public static JreCompat getInstance()
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isGraalAvailable
public static boolean isGraalAvailable()
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isJre12Available
public static boolean isJre12Available()
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isJre16Available
public static boolean isJre16Available()
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isJre19Available
public static boolean isJre19Available()
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isJre21Available
public static boolean isJre21Available()
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isJre22Available
public static boolean isJre22Available()
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getUnixDomainSocketAddress
public java.net.SocketAddress getUnixDomainSocketAddress(java.lang.String path)
Return Unix domain socket address for given path.- Parameters:
path
- The path- Returns:
- the socket address
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openUnixDomainServerSocketChannel
public java.nio.channels.ServerSocketChannel openUnixDomainServerSocketChannel()
Create server socket channel using the Unix domain socket ProtocolFamily.- Returns:
- the server socket channel
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openUnixDomainSocketChannel
public java.nio.channels.SocketChannel openUnixDomainSocketChannel()
Create socket channel using the Unix domain socket ProtocolFamily.- Returns:
- the socket channel
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getExecutor
public java.lang.Object getExecutor(java.lang.Thread thread) throws java.lang.NoSuchFieldException, java.lang.SecurityException, java.lang.IllegalArgumentException, java.lang.IllegalAccessException
Obtains the executor, if any, used to create the provided thread.- Parameters:
thread
- The thread to examine- Returns:
- The executor, if any, that created the provided thread
- Throws:
java.lang.NoSuchFieldException
- If a field used via reflection to obtain the executor cannot be foundjava.lang.SecurityException
- If a security exception occurs while trying to identify the executorjava.lang.IllegalArgumentException
- If the instance object does not match the class of the field when obtaining a field value via reflectionjava.lang.IllegalAccessException
- If a field is not accessible due to access restrictions
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createVirtualThreadBuilder
public java.lang.Object createVirtualThreadBuilder(java.lang.String name)
Create a thread builder for virtual threads using the given name to name the threads.- Parameters:
name
- The base name for the threads- Returns:
- The thread buidler for virtual threads
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threadBuilderStart
public void threadBuilderStart(java.lang.Object threadBuilder, java.lang.Runnable command)
Create a thread with the given thread builder and use it to execute the given runnable.- Parameters:
threadBuilder
- The thread builder to use to create a threadcommand
- The command to run
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callAs
public <T> T callAs(javax.security.auth.Subject subject, java.util.concurrent.Callable<T> action) throws java.util.concurrent.CompletionException
- Throws:
java.util.concurrent.CompletionException
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isCanonCachesDisabled
public boolean isCanonCachesDisabled()
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disableCanonCaches
public boolean disableCanonCaches()
Disable the global canonical file cache.- Returns:
true
if the global canonical file cache was already disabled prior to this call or was disabled as a result of this call, otherwisefalse
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ensureUseCanonCachesFieldIsPopulated
protected void ensureUseCanonCachesFieldIsPopulated()
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