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Jetty
Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
Multiple applications in the same JVM? Wildfly, Tomcat, Jetty.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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Cryptography? Use Java Cryptography Extensions and Java Secure Socket Extensions with Bouncy Castle
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Weld
Weld, including integrations for Servlet containers and Java SE, examples and documentation (by weld)
Need only Dependency injection? Perhaps JBoss Weld, a reference CDI implementation, might interest you.
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Multiple applications in the same JVM? Wildfly, Tomcat, Jetty.
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Oh boy, if that's really what you're going for, you're talking low microseconds, anything slower and you'll be losing money. Also, you have to make sure the GC never triggers. Maybe look at something like Aeron
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I'm using straight up Jetty with a tiny wrapper on servlets https://github.com/bowbahdoe/rosie
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You might like Dropwizard then.
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.