AbstractProtocol (Apache Tomcat 8.5.12 API Documentation)

org.apache.coyote

## Class AbstractProtocol<S>

- java.lang.Object
- - org.apache.coyote.AbstractProtocol<S>

- All Implemented Interfaces:
    MBeanRegistration, ProtocolHandler
  Direct Known Subclasses:
    AbstractAjpProtocol, AbstractHttp11Protocol

      public abstract class AbstractProtocol<S>
      extends Object
      implements ProtocolHandler, MBeanRegistration

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `protected class` | `AbstractProtocol.AsyncTimeout` Async timeout thread
    `protected static class` | `AbstractProtocol.ConnectionHandler<S>`
    `protected static class` | `AbstractProtocol.RecycledProcessors`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected Adapter` | `adapter` The adapter provides the link between the ProtocolHandler and the connector.
    `protected String` | `clientCertProvider` When client certificate information is presented in a form other than instances of `X509Certificate` it needs to be converted before it can be used and this property controls which JSSE provider is used to perform the conversion.
    `protected String` | `domain`
    `protected MBeanServer` | `mserver`
    `protected ObjectName` | `oname`
    `protected int` | `processorCache` The maximum number of idle processors that will be retained in the cache and re-used with a subsequent request.
    `protected ObjectName` | `rgOname` Name of MBean for the Global Request Processor.
    `protected ObjectName` | `tpOname` Name of MBean for the ThreadPool.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractProtocol(AbstractEndpoint<S> endpoint)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addWaitingProcessor(Processor processor)`
    `protected abstract Processor` | `createProcessor()` Create and configure a new Processor instance for the current protocol implementation.
    `protected abstract Processor` | `createUpgradeProcessor(SocketWrapperBase<?> socket, UpgradeToken upgradeToken)`
    `void` | `destroy()` Destroy the protocol (optional).
    `int` | `getAcceptorThreadCount()`
    `int` | `getAcceptorThreadPriority()`
    `Adapter` | `getAdapter()`
    `InetAddress` | `getAddress()`
    `AbstractProtocol.AsyncTimeout` | `getAsyncTimeout()`
    `int` | `getBacklog()`
    `String` | `getClientCertProvider()`
    `long` | `getConnectionCount()`
    `int` | `getConnectionTimeout()`
    `String` | `getDomain()`
    `protected AbstractEndpoint<S>` | `getEndpoint()`
    `Executor` | `getExecutor()` The executor, provide access to the underlying thread pool.
    `protected AbstractEndpoint.Handler<S>` | `getHandler()`
    `int` | `getKeepAliveTimeout()`
    `int` | `getLocalPort()`
    `protected abstract Log` | `getLog()` Concrete implementations need to provide access to their logger to be used by the abstract classes.
    `int` | `getMaxConnections()`
    `int` | `getMaxHeaderCount()`
    `int` | `getMaxThreads()`
    `int` | `getMinSpareThreads()`
    `String` | `getName()` The name will be prefix-address-port if address is non-null and prefix-port if the address is null.
    `int` | `getNameIndex()`
    `protected abstract String` | `getNamePrefix()` Obtain the prefix to be used when construction a name for this protocol handler.
    `protected abstract UpgradeProtocol` | `getNegotiatedProtocol(String name)` Find a suitable handler for the protocol negotiated at the network layer.
    `ObjectName` | `getObjectName()`
    `int` | `getPort()`
    `int` | `getProcessorCache()`
    `String` | `getProperty(String name)` Generic property getter used by the digester.
    `protected abstract String` | `getProtocolName()` Obtain the name of the protocol, (Http, Ajp, etc.).
    `int` | `getSoLinger()`
    `int` | `getSoTimeout()`
    `boolean` | `getTcpNoDelay()`
    `int` | `getThreadPriority()`
    `protected abstract UpgradeProtocol` | `getUpgradeProtocol(String name)` Find a suitable handler for the protocol upgraded name specified.
    `void` | `init()` Initialise the protocol.
    `boolean` | `isAprRequired()` Requires APR/native library
    `boolean` | `isSendfileSupported()` Does this ProtocolHandler support sendfile?
    `void` | `pause()` Pause the protocol (optional).
    `void` | `postDeregister()`
    `void` | `postRegister(Boolean registrationDone)`
    `void` | `preDeregister()`
    `ObjectName` | `preRegister(MBeanServer server, ObjectName name)`
    `void` | `removeWaitingProcessor(Processor processor)`
    `void` | `resume()` Resume the protocol (optional).
    `void` | `setAcceptorThreadCount(int threadCount)`
    `void` | `setAcceptorThreadPriority(int threadPriority)`
    `void` | `setAdapter(Adapter adapter)` The adapter, used to call the connector.
    `void` | `setAddress(InetAddress ia)`
    `void` | `setBacklog(int backlog)`
    `void` | `setClientCertProvider(String s)`
    `void` | `setConnectionTimeout(int timeout)`
    `void` | `setExecutor(Executor executor)`
    `protected void` | `setHandler(AbstractEndpoint.Handler<S> handler)`
    `void` | `setKeepAliveTimeout(int keepAliveTimeout)`
    `void` | `setMaxConnections(int maxConnections)`
    `void` | `setMaxHeaderCount(int maxHeaderCount)`
    `void` | `setMaxThreads(int maxThreads)`
    `void` | `setMinSpareThreads(int minSpareThreads)`
    `void` | `setPort(int port)`
    `void` | `setProcessorCache(int processorCache)`
    `boolean` | `setProperty(String name, String value)` Generic property setter used by the digester.
    `void` | `setSoLinger(int soLinger)`
    `void` | `setSoTimeout(int timeout)`
    `void` | `setTcpNoDelay(boolean tcpNoDelay)`
    `void` | `setThreadPriority(int threadPriority)`
    `void` | `start()` Start the protocol.
    `void` | `stop()` Stop the protocol.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface org.apache.coyote.ProtocolHandler

      `addSslHostConfig, addUpgradeProtocol, findSslHostConfigs, findUpgradeProtocols`

- - ### Field Detail

    - #### rgOname

          protected ObjectName rgOname

      Name of MBean for the Global Request Processor.

    - #### tpOname

          protected ObjectName tpOname

      Name of MBean for the ThreadPool.

    - #### adapter

          protected Adapter adapter

      The adapter provides the link between the ProtocolHandler and the connector.

    - #### processorCache

          protected int processorCache

      The maximum number of idle processors that will be retained in the cache and re-used with a subsequent request. The default is 200. A value of -1 means unlimited. In the unlimited case, the theoretical maximum number of cached Processor objects is `getMaxConnections()` although it will usually be closer to `getMaxThreads()`.

    - #### clientCertProvider

          protected String clientCertProvider

      When client certificate information is presented in a form other than instances of `X509Certificate` it needs to be converted before it can be used and this property controls which JSSE provider is used to perform the conversion. For example it is used with the AJP connectors, the HTTP APR connector and with the `SSLValve`. If not specified, the default provider will be used.

    - #### domain

          protected String domain

    - #### oname

          protected ObjectName oname

    - #### mserver

          protected MBeanServer mserver

  - ### Constructor Detail

    - #### AbstractProtocol

          public AbstractProtocol(AbstractEndpoint<S> endpoint)

  - ### Method Detail

    - #### setProperty

          public boolean setProperty(String name,
                            String value)

      Generic property setter used by the digester. Other code should not need to use this. The digester will only use this method if it can't find a more specific setter. That means the property belongs to the Endpoint, the ServerSocketFactory or some other lower level component. This method ensures that it is visible to both.
      Parameters:
        `name` - The name of the property to set
        `value` - The value, in string form, to set for the property
      Returns:
        `true` if the property was set successfully, otherwise `false`

    - #### getProperty

          public String getProperty(String name)

      Generic property getter used by the digester. Other code should not need to use this.
      Parameters:
        `name` - The name of the property to get
      Returns:
        The value of the property converted to a string

    - #### setAdapter

          public void setAdapter(Adapter adapter)

      Description copied from interface: `ProtocolHandler`
      The adapter, used to call the connector.
      Specified by:
        `setAdapter` in interface `ProtocolHandler`
      Parameters:
        `adapter` - The adapter to associate

    - #### getAdapter

          public Adapter getAdapter()

      Specified by:
        `getAdapter` in interface `ProtocolHandler`

    - #### getProcessorCache

          public int getProcessorCache()

    - #### setProcessorCache

          public void setProcessorCache(int processorCache)

    - #### getClientCertProvider

          public String getClientCertProvider()

    - #### setClientCertProvider

          public void setClientCertProvider(String s)

    - #### isAprRequired

          public boolean isAprRequired()

      Description copied from interface: `ProtocolHandler`
      Requires APR/native library
      Specified by:
        `isAprRequired` in interface `ProtocolHandler`
      Returns:
        `true` if this Protocol Handler requires the APR/native library, otherwise `false`

    - #### isSendfileSupported

          public boolean isSendfileSupported()

      Description copied from interface: `ProtocolHandler`
      Does this ProtocolHandler support sendfile?
      Specified by:
        `isSendfileSupported` in interface `ProtocolHandler`
      Returns:
        `true` if this Protocol Handler supports sendfile, otherwise `false`

    - #### getAsyncTimeout

          public AbstractProtocol.AsyncTimeout getAsyncTimeout()

    - #### getExecutor

          public Executor getExecutor()

      Description copied from interface: `ProtocolHandler`
      The executor, provide access to the underlying thread pool.
      Specified by:
        `getExecutor` in interface `ProtocolHandler`
      Returns:
        The executor used to process requests

    - #### setExecutor

          public void setExecutor(Executor executor)

    - #### getMaxThreads

          public int getMaxThreads()

    - #### setMaxThreads

          public void setMaxThreads(int maxThreads)

    - #### getMaxConnections

          public int getMaxConnections()

    - #### setMaxConnections

          public void setMaxConnections(int maxConnections)

    - #### getMinSpareThreads

          public int getMinSpareThreads()

    - #### setMinSpareThreads

          public void setMinSpareThreads(int minSpareThreads)

    - #### getThreadPriority

          public int getThreadPriority()

    - #### setThreadPriority

          public void setThreadPriority(int threadPriority)

    - #### getBacklog

          public int getBacklog()

    - #### setBacklog

          public void setBacklog(int backlog)

    - #### getTcpNoDelay

          public boolean getTcpNoDelay()

    - #### setTcpNoDelay

          public void setTcpNoDelay(boolean tcpNoDelay)

    - #### getSoLinger

          public int getSoLinger()

    - #### setSoLinger

          public void setSoLinger(int soLinger)

    - #### getKeepAliveTimeout

          public int getKeepAliveTimeout()

    - #### setKeepAliveTimeout

          public void setKeepAliveTimeout(int keepAliveTimeout)

    - #### getAddress

          public InetAddress getAddress()

    - #### setAddress

          public void setAddress(InetAddress ia)

    - #### getPort

          public int getPort()

    - #### setPort

          public void setPort(int port)

    - #### getLocalPort

          public int getLocalPort()

    - #### getConnectionTimeout

          public int getConnectionTimeout()

    - #### setConnectionTimeout

          public void setConnectionTimeout(int timeout)

    - #### getSoTimeout

          public int getSoTimeout()

    - #### setSoTimeout

          public void setSoTimeout(int timeout)

    - #### getMaxHeaderCount

          public int getMaxHeaderCount()

    - #### setMaxHeaderCount

          public void setMaxHeaderCount(int maxHeaderCount)

    - #### getConnectionCount

          public long getConnectionCount()

    - #### setAcceptorThreadCount

          public void setAcceptorThreadCount(int threadCount)

    - #### getAcceptorThreadCount

          public int getAcceptorThreadCount()

    - #### setAcceptorThreadPriority

          public void setAcceptorThreadPriority(int threadPriority)

    - #### getAcceptorThreadPriority

          public int getAcceptorThreadPriority()

    - #### getNameIndex

          public int getNameIndex()

    - #### getName

          public String getName()

      The name will be prefix-address-port if address is non-null and prefix-port if the address is null.
      Returns:
        A name for this protocol instance that is appropriately quoted for use in an ObjectName.

    - #### addWaitingProcessor

          public void addWaitingProcessor(Processor processor)

    - #### removeWaitingProcessor

          public void removeWaitingProcessor(Processor processor)

    - #### getEndpoint

          protected AbstractEndpoint<S> getEndpoint()

    - #### getHandler

          protected AbstractEndpoint.Handler<S> getHandler()

    - #### setHandler

          protected void setHandler(AbstractEndpoint.Handler<S> handler)

    - #### getLog

          protected abstract Log getLog()

      Concrete implementations need to provide access to their logger to be used by the abstract classes.
      Returns:
        the logger

    - #### getNamePrefix

          protected abstract String getNamePrefix()

      Obtain the prefix to be used when construction a name for this protocol handler. The name will be prefix-address-port.
      Returns:
        the prefix

    - #### getProtocolName

          protected abstract String getProtocolName()

      Obtain the name of the protocol, (Http, Ajp, etc.). Used with JMX.
      Returns:
        the protocol name

    - #### getNegotiatedProtocol

          protected abstract UpgradeProtocol getNegotiatedProtocol(String name)

      Find a suitable handler for the protocol negotiated at the network layer.
      Parameters:
        `name` - The name of the requested negotiated protocol.
      Returns:
        The instance where `UpgradeProtocol.getAlpnName()` matches the requested protocol

    - #### getUpgradeProtocol

          protected abstract UpgradeProtocol getUpgradeProtocol(String name)

      Find a suitable handler for the protocol upgraded name specified. This is used for direct connection protocol selection.
      Parameters:
        `name` - The name of the requested negotiated protocol.
      Returns:
        The instance where `UpgradeProtocol.getAlpnName()` matches the requested protocol

    - #### createProcessor

          protected abstract Processor createProcessor()

      Create and configure a new Processor instance for the current protocol implementation.
      Returns:
        A fully configured Processor instance that is ready to use

    - #### createUpgradeProcessor

          protected abstract Processor createUpgradeProcessor(SocketWrapperBase<?> socket,
                                         UpgradeToken upgradeToken)

    - #### getObjectName

          public ObjectName getObjectName()

    - #### getDomain

          public String getDomain()

    - #### preRegister

          public ObjectName preRegister(MBeanServer server,
                               ObjectName name)
                                 throws Exception

      Specified by:
        `preRegister` in interface `MBeanRegistration`
      Throws:
        `Exception`

    - #### postRegister

          public void postRegister(Boolean registrationDone)

      Specified by:
        `postRegister` in interface `MBeanRegistration`

    - #### preDeregister

          public void preDeregister()
                             throws Exception

      Specified by:
        `preDeregister` in interface `MBeanRegistration`
      Throws:
        `Exception`

    - #### postDeregister

          public void postDeregister()

      Specified by:
        `postDeregister` in interface `MBeanRegistration`

    - #### init

          public void init()
                    throws Exception

      Description copied from interface: `ProtocolHandler`
      Initialise the protocol.
      Specified by:
        `init` in interface `ProtocolHandler`
      Throws:
        `Exception` - If the protocol handler fails to initialise

    - #### start

          public void start()
                     throws Exception

      Description copied from interface: `ProtocolHandler`
      Start the protocol.
      Specified by:
        `start` in interface `ProtocolHandler`
      Throws:
        `Exception` - If the protocol handler fails to start

    - #### pause

          public void pause()
                     throws Exception

      Description copied from interface: `ProtocolHandler`
      Pause the protocol (optional).
      Specified by:
        `pause` in interface `ProtocolHandler`
      Throws:
        `Exception` - If the protocol handler fails to pause

    - #### resume

          public void resume()
                      throws Exception

      Description copied from interface: `ProtocolHandler`
      Resume the protocol (optional).
      Specified by:
        `resume` in interface `ProtocolHandler`
      Throws:
        `Exception` - If the protocol handler fails to resume

    - #### stop

          public void stop()
                    throws Exception

      Description copied from interface: `ProtocolHandler`
      Stop the protocol.
      Specified by:
        `stop` in interface `ProtocolHandler`
      Throws:
        `Exception` - If the protocol handler fails to stop

    - #### destroy

          public void destroy()

      Description copied from interface: `ProtocolHandler`
      Destroy the protocol (optional).
      Specified by:
        `destroy` in interface `ProtocolHandler`

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