Question

我们目前正在将一个tomcat应用程序移植到spray / scala中。

我们的旧应用程序有这样的设置：

<Connector port="8082" protocol="HTTP/1.1"
        maxThreads="1000"
        maxConnections="10000"
        processorCache="500"
        connectionTimeout="20000"
        URIEncoding="UTF-8"
        redirectPort="8443" />

在新的应用程序中，我们希望在喷涂中设置相当于maxThreads / maxConnections。

我看到了喷涂reference.conf文件（如下），我想知道这些是否确实是要更改的正确设置？
或者我应该配置正在执行runRoute的actor吗？还是两个？

我确实找到了低＆＃34; max-connections = 4＆＃34;默认有点奇怪，如果那确实是服务器连接限制。

host-connector {
# The maximum number of parallel connections that an `HttpHostConnector`
# is allowed to establish to a host. Must be greater than zero.
max-connections = 4

# The maximum number of times an `HttpHostConnector` attempts to repeat
# failed requests (if the request can be safely retried) before
# giving up and returning an error.
max-retries = 5

# Configures redirection following.
# If set to zero redirection responses will not be followed, i.e. they'll be returned to the user as is.
# If set to a value > zero redirection responses will be followed up to the given number of times.
# If the redirection chain is longer than the configured value the first redirection response that is
# is not followed anymore is returned to the user as is.
max-redirects = 0

# If this setting is enabled, the `HttpHostConnector` pipelines requests
# across connections, otherwise only one single request can be "open"
# on a particular HTTP connection.
pipelining = off

# The time after which an idle `HttpHostConnector` (without open
# connections) will automatically terminate itself.
# Set to `infinite` to completely disable idle timeouts.
idle-timeout = 30 s

# Modify to tweak client settings for this host-connector only.
client = ${spray.can.client}

}

Answer 1

您所指的设置是喷涂客户端设置，而不是喷涂服务器设置。

host-connector {    max-connections = 4 }

这意味着如果您想编写连接到某个外部HTTP服务器的喷涂应用程序，您将无法同时为特定主机创建4个以上的连接。

Spray中没有直接等效于 maxThreads / maxConnections 。因为Spray建立在Akka Actors之上。 Akka Actors使用Dispatchers和Execution Contexts来处理消息。 Spray for Http Listener（处理HTTP请求的actor）中的默认调度程序是：

listener-dispatcher = "akka.actor.default-dispatcher"

您可以阅读有关默认调度程序here

的信息

没有直接的方法在Spray中指定 maxThreads ，因为默认的akka调度程序基于顶级 fork-join-executor ，它正在利用多核架构可能。

要指定 maxConnections ，您必须修改HttpListener的源代码：

case x: Tcp.Bound if(maxConnections()) ⇒ //handle max connections use case

设置喷涂连接限制

1 个答案: