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const {Fragment: _Fragment, jsx: _jsx, jsxs: _jsxs} = arguments[0];
function _createMdxContent(props) {
  const _components = Object.assign({
    p: "p",
    h2: "h2",
    a: "a",
    ul: "ul",
    li: "li",
    pre: "pre",
    code: "code",
    span: "span"
  }, props.components), {Link} = _components;
  if (!Link) _missingMdxReference("Link", true);
  return _jsxs(_Fragment, {
    children: [_jsx(_components.p, {
      children: "We are ex­tremely pleased to an­nounce the first 4.0 beta re­lease of Eclipse Vert.x ."
    }), "\n", _jsx(_components.p, {
      children: "Vert.x 4 is the evo­lu­tion of the Vert.x 3.x se­ries that will bring key fea­tures to Vert.x."
    }), "\n", _jsxs(_components.h2, {
      id: "vertx-web",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#vertx-web"
      }), "Vert.x Web"]
    }), "\n", _jsx(_components.p, {
      children: "Fixed CVE-2020-35217."
    }), "\n", _jsxs(_components.h2, {
      id: "sql-client-metrics",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#sql-client-metrics"
      }), "SQL client metrics"]
    }), "\n", _jsx(_components.p, {
      children: "Vert.x 4 sup­ports met­rics for clients which are crit­i­cal for mon­i­tor­ing ap­pli­ca­tion per­for­mance."
    }), "\n", _jsx(_components.p, {
      children: "While the ca­pa­bil­i­ties are generic and can apply to any client, each client needs a spe­cific in­te­gra­tion.\nOb­vi­ously the SQL client was the per­fect can­di­date in mind for this new fea­ture."
    }), "\n", _jsx(_components.p, {
      children: "Mi­crom­e­ter met­rics will re­port these met­rics as"
    }), "\n", _jsxs(_components.ul, {
      children: ["\n", _jsx(_components.li, {
        children: "vertx_sql_queue_pend­ing: num­ber of re­quests sched­uled but not yet ex­e­cuted"
      }), "\n", _jsx(_components.li, {
        children: "vertx_sql_queue_time: time spent in queue be­fore pro­cess­ing"
      }), "\n", _jsx(_components.li, {
        children: "vertx_sql_pro­cess­ing_pend­ing: num­ber of re­quest being processed"
      }), "\n", _jsx(_components.li, {
        children: "vertx_sql_pro­cess­ing_time: re­quests la­ten­cies"
      }), "\n"]
    }), "\n", _jsxs(_components.h2, {
      id: "a-better-api-for-jdbc-client",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#a-better-api-for-jdbc-client"
      }), "A better API for JDBC Client"]
    }), "\n", _jsx(_components.p, {
      children: "Our JDBC client will not go away in Vert.x 4, we do rec­kn­og­nize that JDBC is im­por­tant be­cause it sup­ports\nthe most im­por­tant num­ber of data­bases in the ecosys­tem."
    }), "\n", _jsx(_components.p, {
      children: "When we de­signed the SQL client API we strived a lot to come with the sim­plest and most pow­er­ful API\nfor asyn­cho­nous SQL client."
    }), "\n", _jsx(_components.p, {
      children: "This re­lease brings an im­ple­men­ta­tion of the SQL client API for JDBC."
    }), "\n", _jsx(_components.p, {
      children: "The 3.x API se­ries will con­tinue to be sup­ported for the life­time of Vert.x 4."
    }), "\n", _jsxs(_components.h2, {
      id: "event-loop-affinity",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#event-loop-affinity"
      }), "Event loop affinity"]
    }), "\n", _jsx(_components.p, {
      children: "Using Vert.x from a non Vert.x thread is a very com­mon use case we have been sup­port­ing since Vert.x 3."
    }), "\n", _jsx(_components.p, {
      children: "When you use a Vert.x re­source (like a client) from a non Vert.x thread, Vert.x 3 ob­tains a new event-​loop\nevery­time it hap­pens."
    }), "\n", _jsx(_components.p, {
      children: "In Vert.x 4 we de­cided to pin the first event loop to the non Vert.x thread. The goal is to pre­vent\nsome data races and also makes rea­son­ning about this eas­ier."
    }), "\n", _jsx(_components.pre, {
      children: _jsxs(_components.code, {
        className: "hljs language-ini",
        children: ["Vertx ", _jsx(_components.span, {
          className: "hljs-attr",
          children: "vertx"
        }), " = Vertx.vertx()", _jsx(_components.span, {
          className: "hljs-comment",
          children: ";"
        }), "\n\nfor (int ", _jsx(_components.span, {
          className: "hljs-attr",
          children: "i"
        }), " = ", _jsx(_components.span, {
          className: "hljs-number",
          children: "0"
        }), _jsx(_components.span, {
          className: "hljs-comment",
          children: ";i < 4;i++) {"
        }), "\n  String ", _jsx(_components.span, {
          className: "hljs-attr",
          children: "msg"
        }), " = ", _jsx(_components.span, {
          className: "hljs-string",
          children: "\"Message \""
        }), " + i", _jsx(_components.span, {
          className: "hljs-comment",
          children: ";"
        }), "\n  vertx.runOnContext(v -> {\n    System.out.println(i)", _jsx(_components.span, {
          className: "hljs-comment",
          children: ";"
        }), "\n  })", _jsx(_components.span, {
          className: "hljs-comment",
          children: ";"
        }), "\n}\n"]
      })
    }), "\n", _jsx(_components.p, {
      children: "Run­ning this with Vert.x 3 will print the 4 lines but they are likely to not be re­ordered, this code could\nalso be run­ning in par­al­lel (that is two dif­fer­ent threads run­ning at the same time on a dif­fer­ent CPU core)."
    }), "\n", _jsx(_components.p, {
      children: "Run­ning this with Vert.x 4 will print the 4 lines in the cor­rect order and al­ways with the same thread. This\nelim­i­nates some po­ten­tial data races and also al­lows to rea­son about what will hap­pen at run­time."
    }), "\n", _jsxs(_components.h2, {
      id: "vertx-json-schema-supports-draft2019-09",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#vertx-json-schema-supports-draft2019-09"
      }), "Vert.x Json Schema supports Draft2019-09"]
    }), "\n", _jsxs(_components.p, {
      children: ["The new ", _jsx(_components.a, {
        href: "https://github.com/eclipse-vertx/vertx-json-schema",
        children: "vertx-​json-schema"
      }), " mod­ule now sup­ports the lat­est Json Schema ", _jsx(_components.a, {
        href: "http://json-schema.org/specification.html",
        children: "Draft2019-09 spec"
      }), ". You can fi­nally play with the new ", _jsx(_components.code, {
        children: "$recursiveRef"
      }), " to build ex­ten­si­ble re­cur­sive schemas and with ", _jsx(_components.code, {
        children: "unevaluatedProperties"
      }), "/", _jsx(_components.code, {
        children: "unevaluatedItems"
      }), " to de­fine strict schemas. Look at the mod­ule ", _jsx(Link, {
        href: "/docs/vertx-json-schema/java/",
        passHref: true,
        children: _jsx(_components.a, {
          href: "",
          children: "doc­u­men­ta­tion"
        })
      }), " to start using it."]
    }), "\n", _jsxs(_components.h2, {
      id: "clustering-configuration-simplified",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#clustering-configuration-simplified"
      }), "Clustering configuration simplified"]
    }), "\n", _jsxs(_components.p, {
      children: ["In Vert.x 3, clus­ter host was set to ", _jsx(_components.code, {
        children: "localhost"
      }), " by de­fault in ", _jsx(_components.code, {
        children: "EventBusOptions"
      }), ".\nCon­se­quently, a lot of new users were con­fused about why event bus con­sumers and pro­duc­ers were not able to com­mu­ni­cate even if the un­der­ly­ing clus­ter man­ager was con­fig­ured cor­rectly."]
    }), "\n", _jsxs(_components.p, {
      children: ["Also, when using the CLI tool or the ", _jsx(_components.code, {
        children: "Launcher"
      }), " class, Vert.x tried to find a host among avail­able net­work in­ter­faces if none was pro­vided with the ", _jsx(_components.code, {
        children: "-cluster-host"
      }), " ar­gu­ment.\nSome­times, the host cho­sen by the clus­ter man­ager and Vert.x were not the same."]
    }), "\n", _jsxs(_components.p, {
      children: ["Start­ing with Vert.x 4 beta 1, the clus­ter host de­fault has been re­moved and, if users don’t pro­vide any, Vert.x will ask the clus­ter man­ager which one it picked be­fore try­ing to find one it­self.\nThis ap­plies whether Vert.x is em­bed­ded in any Java pro­gram or started with the CLI tool or with the ", _jsx(_components.code, {
        children: "Launcher"
      }), " class."]
    }), "\n", _jsxs(_components.p, {
      children: ["So far, only ", _jsx(_components.code, {
        children: "vertx-hazelcast"
      }), " and ", _jsx(_components.code, {
        children: "vertx-infinispan"
      }), " clus­ter man­agers can pro­vide Vert.x with a clus­ter host.\nWhen other clus­ter man­agers are used, Vert.x will choose one it­self."]
    }), "\n", _jsxs(_components.h2, {
      id: "cluster-manager-upgrades",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#cluster-manager-upgrades"
      }), "Cluster manager upgrades"]
    }), "\n", _jsxs(_components.p, {
      children: [_jsx(_components.code, {
        children: "vertx-hazelcast"
      }), " has been up­graded to Hazel­cast 4.0.2 and ", _jsx(_components.code, {
        children: "vertx-infinispan"
      }), " to In­fin­is­pan 11.0.1.Final."]
    }), "\n", _jsxs(_components.h2, {
      id: "finally",
      children: [_jsx(_components.a, {
        "aria-hidden": true,
        tabIndex: "-1",
        className: "heading-anchor",
        href: "#finally"
      }), "Finally"]
    }), "\n", _jsx(_components.p, {
      children: "This is the Beta1 re­lase of Vert.x 4, you can of course ex­pect more betas as we get feed­back from the com­mu­nity and fix is­sues that we failed to catch be­fore."
    }), "\n", _jsx(_components.p, {
      children: "You can also read the mile­stone an­nounces to know more about the over­ral changes:"
    }), "\n", _jsxs(_components.ul, {
      children: ["\n", _jsx(_components.li, {
        children: _jsx(Link, {
          href: "/blog/eclipse-vert-x-4-milestone-5-released",
          passHref: true,
          children: _jsx(_components.a, {
            href: "",
            children: "https://vertx.io/blog/eclipse-​vert-x-4-​milestone-5-​released"
          })
        })
      }), "\n", _jsx(_components.li, {
        children: _jsx(Link, {
          href: "/blog/eclipse-vert-x-4-milestone-4-released",
          passHref: true,
          children: _jsx(_components.a, {
            href: "",
            children: "https://vertx.io/blog/eclipse-​vert-x-4-​milestone-4-​released"
          })
        })
      }), "\n", _jsx(_components.li, {
        children: _jsx(Link, {
          href: "/blog/eclipse-vert-x-4-milestone-3-released",
          passHref: true,
          children: _jsx(_components.a, {
            href: "",
            children: "https://vertx.io/blog/eclipse-​vert-x-4-​milestone-3-​released"
          })
        })
      }), "\n", _jsx(_components.li, {
        children: _jsx(Link, {
          href: "/blog/eclipse-vert-x-4-milestone-2-released",
          passHref: true,
          children: _jsx(_components.a, {
            href: "",
            children: "https://vertx.io/blog/eclipse-​vert-x-4-​milestone-2-​released"
          })
        })
      }), "\n", _jsx(_components.li, {
        children: _jsx(Link, {
          href: "/blog/eclipse-vert-x-4-milestone-1-released",
          passHref: true,
          children: _jsx(_components.a, {
            href: "",
            children: "https://vertx.io/blog/eclipse-​vert-x-4-​milestone-1-​released"
          })
        })
      }), "\n"]
    }), "\n", _jsxs(_components.p, {
      children: ["The ", _jsx(_components.a, {
        href: "https://github.com/vert-x3/wiki/wiki/4.0.0-Deprecations-and-breaking-changes",
        children: "dep­re­ca­tions and break­ing changes"
      }), "\ncan be found on the wiki."]
    }), "\n", _jsx(_components.p, {
      children: "For this re­lease there are no Docker im­ages."
    }), "\n", _jsxs(_components.p, {
      children: ["The re­lease ar­ti­facts have been de­ployed to ", _jsx(_components.a, {
        href: "https://search.maven.org/search?q=g:io.vertx%20AND%20v:4.0.0.Beta1",
        children: "Maven Cen­tral"
      }), " and you can get the dis­tri­b­u­tion on ", _jsx(_components.a, {
        href: "https://repo1.maven.org/maven2/io/vertx/vertx-stack-manager/4.0.0.Beta1/",
        children: "Maven Cen­tral"
      }), "."]
    }), "\n", _jsxs(_components.p, {
      children: ["You can boot­strap a Vert.x 4.0.0.Beta1 project using ", _jsx(_components.a, {
        href: "https://start.vertx.io",
        children: "https://start.vertx.io"
      }), "."]
    }), "\n", _jsxs(_components.p, {
      children: ["The doc­u­men­ta­tion has been de­ployed on this pre­view web-​site ", _jsx(_components.a, {
        href: "https://vertx-web-site.github.io/docs/",
        children: "https://vertx-​web-site.github.io/docs/"
      })]
    }), "\n", _jsxs(_components.p, {
      children: ["That’s it! Happy cod­ing and see you soon on our user or dev ", _jsx(Link, {
        href: "/community",
        passHref: true,
        children: _jsx(_components.a, {
          href: "",
          children: "chan­nels"
        })
      }), "."]
    })]
  });
}
function MDXContent(props = {}) {
  const {wrapper: MDXLayout} = props.components || ({});
  return MDXLayout ? _jsx(MDXLayout, Object.assign({}, props, {
    children: _jsx(_createMdxContent, props)
  })) : _createMdxContent(props);
}
return {
  default: MDXContent
};
function _missingMdxReference(id, component) {
  throw new Error("Expected " + (component ? "component" : "object") + " `" + id + "` to be defined: you likely forgot to import, pass, or provide it.");
}


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