Package org.restlet.ext.jetty

Class JettyServerHelper

  • Direct Known Subclasses:
    HttpServerHelper, HttpsServerHelper
    public abstract class JettyServerHelper
extends org.restlet.engine.adapter.HttpServerHelper
    Abstract Jetty web server connector. Here is the list of parameters that are supported. They should be set in the Server's context before it is started:
    list of supported parameters
    Parameter name Value type Default value Description
    threadPool.minThreads int 8 Thread pool minimum threads
    threadPool.maxThreads int 200 Thread pool max threads
    threadPool.threadsPriority int Thread.NORM_PRIORITY Thread pool threads priority
    threadPool.idleTimeout int 60000 Thread pool idle timeout in milliseconds; threads that are idle for longer than this period may be stopped
    threadPool.stopTimeout long 5000 Thread pool stop timeout in milliseconds; the maximum time allowed for the service to shutdown
    connector.acceptors int -1 Connector acceptor thread count; when -1, Jetty will default to Runtime.availableProcessors() / 2, with a minimum of 1
    connector.selectors int -1 Connector selector thread count; when -1, Jetty will default to Runtime.availableProcessors()
    connector.acceptQueueSize int 0 Connector accept queue size; also known as accept backlog
    connector.idleTimeout int 30000 Connector idle timeout in milliseconds; see Socket.setSoTimeout(int); this value is interpreted as the maximum time between some progress being made on the connection; so if a single byte is read or written, then the timeout is reset
    connector.soLingerTime int -1 Connector TCP/IP SO linger time in milliseconds; when -1 is disabled; see Socket.setSoLinger(boolean, int)
    connector.stopTimeout long 30000 Connector stop timeout in milliseconds; the maximum time allowed for the service to shutdown
    http.headerCacheSize int 512 HTTP header cache size in bytes
    http.requestHeaderSize int 8*1024 HTTP request header size in bytes; larger headers will allow for more and/or larger cookies plus larger form content encoded in a URL; however, larger headers consume more memory and can make a server more vulnerable to denial of service attacks
    http.responseHeaderSize int 8*1024 HTTP response header size in bytes; larger headers will allow for more and/or larger cookies and longer HTTP headers (e.g. for redirection); however, larger headers will also consume more memory
    http.outputBufferSize int 32*1024 HTTP output buffer size in bytes; a larger buffer can improve performance by allowing a content producer to run without blocking, however larger buffers consume more memory and may induce some latency before a client starts processing the content
    lowResource.period int 1000 Low resource monitor period in milliseconds; when 0, low resource monitoring is disabled
    lowResource.threads boolean true Low resource monitor, whether to check if we're low on threads
    lowResource.maxMemory int 0 Low resource monitor max memory in bytes; when 0, the check disabled; memory used is calculated as (totalMemory-freeMemory)
    lowResource.maxConnections int 0 Low resource monitor max connections; when 0, the check is disabled
    lowResource.idleTimeout int 1000 Low resource monitor idle timeout in milliseconds; applied to EndPoints when in the low resources state
    lowResource.stopTimeout long 30000 Low resource monitor stop timeout in milliseconds; the maximum time allowed for the service to shutdown
    Author:
    Jerome Louvel, Tal Liron
    See Also:
    Jetty home page, Jetty SPDY page, Jetty NPN configuration page

    • Constructor Detail

      • JettyServerHelper

        public JettyServerHelper​(org.restlet.Server server)
        Constructor.
        Parameters:
        server - The server to help.

    • Method Detail

      • createConnectionFactories

        protected abstract org.eclipse.jetty.server.ConnectionFactory[] createConnectionFactories​(org.eclipse.jetty.server.HttpConfiguration configuration)
        Creates new internal Jetty connection factories.
        Parameters:
        configuration - The HTTP configuration.
        Returns:
        New internal Jetty connection factories.

      • getConnectorAcceptors

        public int getConnectorAcceptors()
        Connector acceptor thread count. Defaults to -1. When -1, Jetty will default to Runtime.availableProcessors() / 2, with a minimum of 1.
        Returns:
        Connector acceptor thread count.

      • getConnectorAcceptQueueSize

        public int getConnectorAcceptQueueSize()
        Connector accept queue size. Defaults to 0.

        Also known as accept backlog.

        Returns:
        Connector accept queue size.

      • getConnectorByteBufferPool

        public org.eclipse.jetty.io.ByteBufferPool getConnectorByteBufferPool()
        Connector byte buffer pool. Defaults to null. When null, will use a new ArrayByteBufferPool.
        Returns:
        Connector byte buffer pool or null.

      • getConnectorExecutor

        public java.util.concurrent.Executor getConnectorExecutor()
        Connector executor. Defaults to null. When null, will use the server's thread pool.
        Returns:
        Connector executor or null.

      • getConnectorIdleTimeout

        public int getConnectorIdleTimeout()
        Connector idle timeout in milliseconds. Defaults to 30000.

        See Socket.setSoTimeout(int).

        This value is interpreted as the maximum time between some progress being made on the connection. So if a single byte is read or written, then the timeout is reset.

        Returns:
        Connector idle timeout.

      • getConnectorScheduler

        public org.eclipse.jetty.util.thread.Scheduler getConnectorScheduler()
        Connector scheduler. Defaults to null. When null, will use a new ScheduledExecutorScheduler.
        Returns:
        Connector scheduler or null.

      • getConnectorSelectors

        public int getConnectorSelectors()
        Connector selector thread count. Defaults to -1. When 0, Jetty will default to Runtime.availableProcessors().
        Returns:
        Connector acceptor thread count.

      • getConnectorSoLingerTime

        public int getConnectorSoLingerTime()
        Connector TCP/IP SO linger time in milliseconds. Defaults to -1 (disabled).

        See Socket.setSoLinger(boolean, int).

        Returns:
        Connector TCP/IP SO linger time.

      • getConnectorStopTimeout

        public int getConnectorStopTimeout()
        Connector stop timeout in milliseconds. Defaults to 30000.

        The maximum time allowed for the service to shutdown.

        Returns:
        Connector stop timeout.

      • getHttpHeaderCacheSize

        public int getHttpHeaderCacheSize()
        HTTP header cache size in bytes. Defaults to 512.
        Returns:
        HTTP header cache size.

      • getHttpOutputBufferSize

        public int getHttpOutputBufferSize()
        HTTP output buffer size in bytes. Defaults to 32*1024.

        A larger buffer can improve performance by allowing a content producer to run without blocking, however larger buffers consume more memory and may induce some latency before a client starts processing the content.

        Returns:
        HTTP output buffer size.

      • getHttpRequestHeaderSize

        public int getHttpRequestHeaderSize()
        HTTP request header size in bytes. Defaults to 8*1024.

        Larger headers will allow for more and/or larger cookies plus larger form content encoded in a URL. However, larger headers consume more memory and can make a server more vulnerable to denial of service attacks.

        Returns:
        HTTP request header size.

      • getHttpResponseHeaderSize

        public int getHttpResponseHeaderSize()
        HTTP response header size in bytes. Defaults to 8*1024.

        Larger headers will allow for more and/or larger cookies and longer HTTP headers (e.g. for redirection). However, larger headers will also consume more memory.

        Returns:
        HTTP response header size.

      • getLowResourceMonitorIdleTimeout

        public int getLowResourceMonitorIdleTimeout()
        Low resource monitor idle timeout in milliseconds. Defaults to 1000.

        Applied to EndPoints when in the low resources state.

        Returns:
        Low resource monitor idle timeout.

      • getLowResourceMonitorMaxConnections

        public int getLowResourceMonitorMaxConnections()
        Low resource monitor max connections. Defaults to 0. When 0, the check is disabled.
        Returns:
        Low resource monitor max connections.

      • getLowResourceMonitorMaxMemory

        public long getLowResourceMonitorMaxMemory()
        Low resource monitor max memory in bytes. Defaults to 0. When 0, the check disabled.

        Memory used is calculated as (totalMemory-freeMemory).

        Returns:
        Low resource monitor max memory.

      • getLowResourceMonitorPeriod

        public int getLowResourceMonitorPeriod()
        Low resource monitor period in milliseconds. Defaults to 1000. When 0, low resource monitoring is disabled.
        Returns:
        Low resource monitor period.

      • getLowResourceMonitorStopTimeout

        public long getLowResourceMonitorStopTimeout()
        Low resource monitor stop timeout in milliseconds. Defaults to 30000.

        The maximum time allowed for the service to shutdown.

        Returns:
        Low resource monitor stop timeout.

      • getLowResourceMonitorThreads

        public boolean getLowResourceMonitorThreads()
        Low resource monitor, whether to check if we're low on threads. Defaults to true.
        Returns:
        Low resource monitor threads.

      • getThreadPoolIdleTimeout

        public int getThreadPoolIdleTimeout()
        Thread pool idle timeout in milliseconds. Defaults to 60000.

        Threads that are idle for longer than this period may be stopped.

        Returns:
        Thread pool idle timeout.

      • getThreadPoolMaxThreads

        public int getThreadPoolMaxThreads()
        Thread pool maximum threads. Defaults to 200.
        Returns:
        Thread pool maximum threads.

      • getThreadPoolMinThreads

        public int getThreadPoolMinThreads()
        Thread pool minimum threads. Defaults to 8.
        Returns:
        Thread pool minimum threads.

      • getThreadPoolStopTimeout

        public long getThreadPoolStopTimeout()
        Thread pool stop timeout in milliseconds. Defaults to 5000.

        The maximum time allowed for the service to shutdown.

        Returns:
        Thread pool stop timeout.

      • getThreadPoolThreadsPriority

        public int getThreadPoolThreadsPriority()
        Thread pool threads priority. Defaults to Thread.NORM_PRIORITY.
        Returns:
        Thread pool maximum threads.

      • getWrappedServer

        protected org.eclipse.jetty.server.Server getWrappedServer()
        Returns the wrapped Jetty server.
        Returns:
        The wrapped Jetty server.

      • setWrappedServer

        protected void setWrappedServer​(org.eclipse.jetty.server.Server wrappedServer)
        Sets the wrapped Jetty server.
        Parameters:
        wrappedServer - The wrapped Jetty server.

      • start

        public void start()
           throws java.lang.Exception
        Overrides:
        start in class org.restlet.engine.connector.ConnectorHelper<org.restlet.Server>
        Throws:
        java.lang.Exception

      • stop

        public void stop()
          throws java.lang.Exception
        Overrides:
        stop in class org.restlet.engine.connector.ServerHelper
        Throws:
        java.lang.Exception