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ctiveSelectable())?this.select(c)&&b.preventDefault():(c=this.menu.getTopSelectable())&&this.autocomplete(c)&&b.preventDefault()},_onEscKeyed:function(){this.close()},_onUpKeyed:function(){this.moveCursor(-1)},_onDownKeyed:function(){this.moveCursor(1)},_onLeftKeyed:function(){"rtl"===this.dir&&this.input.isCursorAtEnd()&&this.autocomplete(this.menu.getTopSelectable())},_onRightKeyed:function(){"ltr"===this.dir&&this.input.isCursorAtEnd()&&this.autocomplete(this.menu.getTopSelectable())},_onQueryChanged:function(a,b){this._minLengthMet(b)?this.menu.update(b):this.menu.empty()},_onWhitespaceChanged:function(){this._updateHint()},_onLangDirChanged:function(a,b){this.dir!==b&&(this.dir=b,this.menu.setLanguageDirection(b))},_openIfActive:function(){this.isActive()&&this.open()},_minLengthMet:function(a){return a=b.isString(a)?a:this.input.getQuery()||"",a.length>=this.minLength},_updateHint:function(){var a,c,d,e,f,h,i;a=this.menu.getTopSelectable(),c=this.menu.getSelectableData(a),d=th 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resetInputValue(),this.eventBus.trigger("close")),!this.isOpen()},setVal:function(a){this.input.setQuery(b.toStr(a))},getVal:function(){return this.input.getQuery()},select:function(a){var b=this.menu.getSelectableData(a);return b&&!this.eventBus.before("select",b.obj)?(this.input.setQuery(b.val,!0),this.eventBus.trigger("select",b.obj),this.close(),!0):!1},autocomplete:function(a){var b,c,d;return b=this.input.getQuery(),c=this.menu.getSelectableData(a),d=c&&b!==c.val,d&&!this.eventBus.before("autocomplete",c.obj)?(this.input.setQuery(c.val),this.eventBus.trigger("autocomplete",c.obj),!0):!1},moveCursor:function(a){var b,c,d,e,f;return b=this.input.getQuery(),c=this.menu.selectableRelativeToCursor(a),d=this.menu.getSelectableData(c),e=d?d.obj:null,f=this._minLengthMet()&&this.menu.update(b),f||this.eventBus.before("cursorchange",e)?!1:(this.menu.setCursor(c),d?this.input.setInputValue(d.val):(this.input.resetInputValue(),this._updateHint()),this.eventBus.trigger("cursorchange",e),! 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http://git-wip-us.apache.org/repos/asf/tomee-site-generator/blob/972cc356/src/main/jbake/assets/js/typed.js ---------------------------------------------------------------------- diff --git a/src/main/jbake/assets/js/typed.js b/src/main/jbake/assets/js/typed.js new file mode 100755 index 0000000..3a51c6e --- /dev/null +++ b/src/main/jbake/assets/js/typed.js @@ -0,0 +1,421 @@ +// The MIT License (MIT) + +// Typed.js | Copyright (c) 2014 Matt Boldt | www.mattboldt.com + +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: + +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + + + + +! function($) { + + "use strict"; + + var Typed = function(el, options) { + + // chosen element to manipulate text + this.el = $(el); + + // options + this.options = $.extend({}, $.fn.typed.defaults, options); + + // attribute to type into + this.isInput = this.el.is('input'); + this.attr = this.options.attr; + + // show cursor + this.showCursor = this.isInput ? false : this.options.showCursor; + + // text content of element + this.elContent = this.attr ? this.el.attr(this.attr) : this.el.text() + + // html or plain text + this.contentType = this.options.contentType; + + // typing speed + this.typeSpeed = this.options.typeSpeed; + + // add a delay before typing starts + this.startDelay = this.options.startDelay; + + // backspacing speed + this.backSpeed = this.options.backSpeed; + + // amount of time to wait before backspacing + this.backDelay = this.options.backDelay; + + // input strings of text + this.strings = this.options.strings; + + // character number position of current string + this.strPos = 0; + + // current array position + this.arrayPos = 0; + + // number to stop backspacing on. + // default 0, can change depending on how many chars + // you want to remove at the time + this.stopNum = 0; + + // Looping logic + this.loop = this.options.loop; + this.loopCount = this.options.loopCount; + this.curLoop = 0; + + // for stopping + this.stop = false; + + // custom cursor + this.cursorChar = this.options.cursorChar; + + // shuffle the strings + this.shuffle = this.options.shuffle; + // the order of strings + this.sequence = []; + + // All systems go! + this.build(); + }; + + Typed.prototype = { + + constructor: Typed + + , + init: function() { + // begin the loop w/ first current string (global self.string) + // current string will be passed as an argument each time after this + var self = this; + self.timeout = setTimeout(function() { + for (var i=0;i<self.strings.length;++i) self.sequence[i]=i; + + // shuffle the array if true + if(self.shuffle) self.sequence = self.shuffleArray(self.sequence); + + // Start typing + self.typewrite(self.strings[self.sequence[self.arrayPos]], self.strPos); + }, self.startDelay); + } + + , + build: function() { + // Insert cursor + if (this.showCursor === true) { + this.cursor = $("<span class=\"typed-cursor\">" + this.cursorChar + "</span>"); + this.el.after(this.cursor); + } + this.init(); + } + + // pass current string state to each function, types 1 char per call + , + typewrite: function(curString, curStrPos) { + // exit when stopped + if (this.stop === true) { + return; + } + + // varying values for setTimeout during typing + // can't be global since number changes each time loop is executed + var humanize = Math.round(Math.random() * (100 - 30)) + this.typeSpeed; + var self = this; + + // ------------- optional ------------- // + // backpaces a certain string faster + // ------------------------------------ // + // if (self.arrayPos == 1){ + // self.backDelay = 50; + // } + // else{ self.backDelay = 500; } + + // contain typing function in a timeout humanize'd delay + self.timeout = setTimeout(function() { + // check for an escape character before a pause value + // format: \^\d+ .. eg: ^1000 .. should be able to print the ^ too using ^^ + // single ^ are removed from string + var charPause = 0; + var substr = curString.substr(curStrPos); + if (substr.charAt(0) === '^') { + var skip = 1; // skip atleast 1 + if (/^\^\d+/.test(substr)) { + substr = /\d+/.exec(substr)[0]; + skip += substr.length; + charPause = parseInt(substr); + } + + // strip out the escape character and pause value so they're not printed + curString = curString.substring(0, curStrPos) + curString.substring(curStrPos + skip); + } + + if (self.contentType === 'html') { + // skip over html tags while typing + var curChar = curString.substr(curStrPos).charAt(0) + if (curChar === '<' || curChar === '&') { + var tag = ''; + var endTag = ''; + if (curChar === '<') { + endTag = '>' + } else { + endTag = ';' + } + while (curString.substr(curStrPos).charAt(0) !== endTag) { + tag += curString.substr(curStrPos).charAt(0); + curStrPos++; + } + curStrPos++; + tag += endTag; + } + } + + // timeout for any pause after a character + self.timeout = setTimeout(function() { + if (curStrPos === curString.length) { + // fires callback function + self.options.onStringTyped(self.arrayPos); + + // is this the final string + if (self.arrayPos === self.strings.length - 1) { + // animation that occurs on the last typed string + self.options.callback(); + + self.curLoop++; + + // quit if we wont loop back + if (self.loop === false || self.curLoop === self.loopCount) + return; + } + + self.timeout = setTimeout(function() { + self.backspace(curString, curStrPos); + }, self.backDelay); + } else { + + /* call before functions if applicable */ + if (curStrPos === 0) + self.options.preStringTyped(self.arrayPos); + + // start typing each new char into existing string + // curString: arg, self.el.html: original text inside element + var nextString = curString.substr(0, curStrPos + 1); + if (self.attr) { + self.el.attr(self.attr, nextString); + } else { + if (self.isInput) { + self.el.val(nextString); + } else if (self.contentType === 'html') { + self.el.html(nextString); + } else { + self.el.text(nextString); + } + } + + // add characters one by one + curStrPos++; + // loop the function + self.typewrite(curString, curStrPos); + } + // end of character pause + }, charPause); + + // humanized value for typing + }, humanize); + + } + + , + backspace: function(curString, curStrPos) { + // exit when stopped + if (this.stop === true) { + return; + } + + // varying values for setTimeout during typing + // can't be global since number changes each time loop is executed + var humanize = Math.round(Math.random() * (100 - 30)) + this.backSpeed; + var self = this; + + self.timeout = setTimeout(function() { + + // ----- this part is optional ----- // + // check string array position + // on the first string, only delete one word + // the stopNum actually represents the amount of chars to + // keep in the current string. In my case it's 14. + // if (self.arrayPos == 1){ + // self.stopNum = 14; + // } + //every other time, delete the whole typed string + // else{ + // self.stopNum = 0; + // } + + if (self.contentType === 'html') { + // skip over html tags while backspacing + if (curString.substr(curStrPos).charAt(0) === '>') { + var tag = ''; + while (curString.substr(curStrPos).charAt(0) !== '<') { + tag -= curString.substr(curStrPos).charAt(0); + curStrPos--; + } + curStrPos--; + tag += '<'; + } + } + + // ----- continue important stuff ----- // + // replace text with base text + typed characters + var nextString = curString.substr(0, curStrPos); + if (self.attr) { + self.el.attr(self.attr, nextString); + } else { + if (self.isInput) { + self.el.val(nextString); + } else if (self.contentType === 'html') { + self.el.html(nextString); + } else { + self.el.text(nextString); + } + } + + // if the number (id of character in current string) is + // less than the stop number, keep going + if (curStrPos > self.stopNum) { + // subtract characters one by one + curStrPos--; + // loop the function + self.backspace(curString, curStrPos); + } + // if the stop number has been reached, increase + // array position to next string + else if (curStrPos <= self.stopNum) { + self.arrayPos++; + + if (self.arrayPos === self.strings.length) { + self.arrayPos = 0; + + // Shuffle sequence again + if(self.shuffle) self.sequence = self.shuffleArray(self.sequence); + + self.init(); + } else + self.typewrite(self.strings[self.sequence[self.arrayPos]], curStrPos); + } + + // humanized value for typing + }, humanize); + + } + /** + * Shuffles the numbers in the given array. + * @param {Array} array + * @returns {Array} + */ + ,shuffleArray: function(array) { + var tmp, current, top = array.length; + if(top) while(--top) { + current = Math.floor(Math.random() * (top + 1)); + tmp = array[current]; + array[current] = array[top]; + array[top] = tmp; + } + return array; + } + + // Start & Stop currently not working + + // , stop: function() { + // var self = this; + + // self.stop = true; + // clearInterval(self.timeout); + // } + + // , start: function() { + // var self = this; + // if(self.stop === false) + // return; + + // this.stop = false; + // this.init(); + // } + + // Reset and rebuild the element + , + reset: function() { + var self = this; + clearInterval(self.timeout); + var id = this.el.attr('id'); + this.el.after('<span id="' + id + '"/>') + this.el.remove(); + if (typeof this.cursor !== 'undefined') { + this.cursor.remove(); + } + // Send the callback + self.options.resetCallback(); + } + + }; + + $.fn.typed = function(option) { + return this.each(function() { + var $this = $(this), + data = $this.data('typed'), + options = typeof option == 'object' && option; + if (!data) $this.data('typed', (data = new Typed(this, options))); + if (typeof option == 'string') data[option](); + }); + }; + + $.fn.typed.defaults = { + strings: ["These are the default values...", "You know what you should do?", "Use your own!", "Have a great day!"], + // typing speed + typeSpeed: 0, + // time before typing starts + startDelay: 0, + // backspacing speed + backSpeed: 0, + // shuffle the strings + shuffle: false, + // time before backspacing + backDelay: 500, + // loop + loop: false, + // false = infinite + loopCount: false, + // show cursor + showCursor: true, + // character for cursor + cursorChar: "|", + // attribute to type (null == text) + attr: null, + // either html or text + contentType: 'html', + // call when done callback function + callback: function() {}, + // starting callback function before each string + preStringTyped: function() {}, + //callback for every typed string + onStringTyped: function() {}, + // callback for reset + resetCallback: function() {} + }; + + +}(window.jQuery); \ No newline at end of file http://git-wip-us.apache.org/repos/asf/tomee-site-generator/blob/972cc356/src/main/jbake/assets/js/typewriter.js ---------------------------------------------------------------------- diff --git a/src/main/jbake/assets/js/typewriter.js b/src/main/jbake/assets/js/typewriter.js new file mode 100755 index 0000000..a28b187 --- /dev/null +++ b/src/main/jbake/assets/js/typewriter.js @@ -0,0 +1,54 @@ +// typewriter + +// 3215287 +// bertae...@gmail.com +(function($, w, d, undefined) { + + function typewriter() { + + // Globals + var self = this, speed; + + function init(element, options) { + // Set Globals + var str; + var indice = 0; + + self.options = $.extend( {}, $.fn.typewriter.options, options ); + $currentElement = $(element); + elementStr = $currentElement.text().replace(/\s+/g, ' '); + dataSpeed = $currentElement.data("speed") || self.options.speed; + $currentElement.empty(); + var showText = setInterval( + function(){ + if (indice++ < elementStr.length) { + $currentElement.append(elementStr[indice - 1]); 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fully relies on Tomcat clustering: https://tomcat.apache.org/tomcat-7.0-doc/cluster-howto.html[Tomcat Clustering]. + +The configuration is mainly in `conf/server.xml` and since TomEE 7 CDI `@SessionScoped` is transparently clustered +through the session. + +=== Hazelcast as session provider + +Hazelcast did a post on this topic on https://hazelcast.com/use-cases/web-session-clustering/session-clustering-tomee/[Session Clustering With TomEE]. + +Tomitribe also demonstrated you can distributed `@Stateful` beans easily relying on hazelcast: https://github.com/tomitribe/hazelcast-tomee-poc[Hazelcast TomEE PoC]. + +=== Load balancing + +TomEE being a HTTP server all HTTP load balancer such as HTTPd (a.k.a. Apache2), ngnix, F5 etc... will work. + +More documentation on HTTPd link can be found on https://tomcat.apache.org/connectors-doc/webserver_howto/apache.html[Tomcat] website. + +=== EJBd + +If you use the EJBd protocol (`@Remote` EJB proprietary protocol of TomEE) you can get cluster features on the client +part. + +==== Multicast + +Multicast is the preferred way to broadcast the heartbeat on the network. The simple technique of broadcasting a non-changing service URI on the network has specific advantages to multicast. The URI itself is essentially stateless and there is no "i'm alive" URI or an "i'm dead" URI. + +In this way the issues with UDP being unordered and unreliable melt away as state is no longer a concern and packet sizes are always small. Complicated libraries that ride atop UDP and attempt to offer reliability (retransmission) and ordering on UDP can be avoided. As well the advantages UDP has over TCP are retained as there are no java layers attempting to force UDP communication to be more TCP-like. The simple design means UDP/Multicast is only used for discovery and from there on out critical information is transmitted over TCP/IP which is obviously going to do a better job at ensuring reliability and ordering. + +===== Server Configuration + +When you boot the server there should be a conf/multicast.properties file containing: + +[source,bash] +---- +server = org.apache.openejb.server.discovery.MulticastDiscoveryAgent +bind = 239.255.2.3 +port = 6142 +disabled = true +group = default +---- + +Just need to enable that by setting disabled=false. All of the above settings except server can be changed. The port and bind must be valid for general multicast/udp network communication. + +The group setting can be changed to further group servers that may use the same multicast channel. As shown below the client also has a group setting which can be used to select an appropriate server from the multicast channel. + +IMPORTANT: for multicast to work you need to have ejbd activated as a normal service. This can be done setting in `conf/system.properties` the entry: `openejb.service.manager.class = org.apache.openejb.server.SimpleServiceManager`. + +===== Multicast Client + +The multicast functionality is not just for servers to find each other in a cluster, it can also be used for EJB clients to discover a server. A special multicast:// URL can be used in the InitialContext properties to signify that multicast should be used to seed the connection process. Such as: + +[source,java] +---- +Properties p = new Properties(); +p.put(Context.INITIAL_CONTEXT_FACTORY, +"org.apache.openejb.client.RemoteInitialContextFactory"); +p.put(Context.PROVIDER_URL, "multicast://239.255.2.3:6142?group=default"); +InitialContext remoteContext = new InitialContext(p); +---- + +The URL has optional query parameters such as schemes and group and timeout which allow you to zero in on a particular type of service of a particular cluster group as well as set how long you are willing to wait in the discovery process till finally giving up. The first matching service that it sees "flowing" around on the UDP stream is the one it picks and sticks to for that and subsequent requests, ensuring UDP is only used when there are no other servers to talk to. + +Note that EJB clients do not need to use multicast to find a server. If the client knows the URL of a server in the cluster, it may use it and connect directly to that server, at which point that server will share the full list of its peers. + +===== Multicast Servers with TCP Clients + +Note that clients do not need to use multicast to communicate with servers. Servers can use multicast to discover each other, but clients are still free to connect to servers in the network using the server's TCP address. + +[source,java] +---- +Properties p = new Properties(); +p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory"); +p.put(Context.PROVIDER_URL, "ejbd://192.168.1.30:4201"); +InitialContext remoteContext = new InitialContext(p); +When the client connects, the server will send the URLs of all the servers in the group and failover will take place normally. +---- + +==== Multipulse + +MultiPulse is an alternative multicast lookup that does not use a regular heartbeat. Instead, servers listen for a multicast request packet (a pulse) to which a response is then sent. Multicast network traffic is effectively reduced to an absolute minimum. + +MultiPulse is only useful in network scenarios where both client and server can be configured to send multicast UDP packets. + +===== Server Configuration + +After you boot the server for the first time the default configuration will create the file conf/conf.d/multipulse.properties containing: + +[source,bash] +---- +server = org.apache.openejb.server.discovery.MulticastPulseAgent +bind = 239.255.2.3 +port = 6142 +disabled = true +group = default +---- + +You just need to enable the agent by setting disabled = false. It is advisable to disable multicast in the multicast.properties file, or at least to use a different bind address or port should you wish to use both. + +All of the above settings except server can be modified as required. The port and bind must be valid for general multicast/udp network communication. + +The group setting can be changed to further group/cluster servers that may use the same multicast channel. As shown below the client also has an optional group setting which can be used to select an appropriate server cluster from the multicast channel (See MultiPulse Client). + +The next step is to ensure that the advertised services are configured for discovery. Edit the ejbd.properties file (and any other enabled services such as http, etc.) and ensure that the discovery option is set to a value that remote clients will be able to resolve. + +[source,bash] +---- +server = org.apache.openejb.server.ejbd.EjbServer +bind = 0.0.0.0 +port = 4201 +disabled = false +threads = 20 +discovery = ejb:ejbd://{bind}:{port} +---- + +NOTE: If either 0.0.0.0 (IPv4) or [::] (IPv6) wildcard bind addresses are used then the server will actually broadcast all of it's known public hosts to clients. Clients will then cycle though and attempt to connect to the provided hosts until successful. + +If localhost is used then only clients on the same physical machine will actually 'see' the server response. + +===== MultiPulse Client + +The multipulse functionality is not just for servers to find each other in a cluster, it can also be used for EJB clients to discover a server. A special multipulse:// URL can be used in the InitialContext properties to signify that multipulse should be used to seed the connection process. Such as: + +[source,java] +---- +Properties p = new Properties(); +p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory"); +p.put(Context.PROVIDER_URL, "multipulse://239.255.2.3:6142?group=default&timeout=250"); +InitialContext remoteContext = new InitialContext(p); +---- + +The URL has optional query parameters such as schemes and group and timeout which allow you to zero in on a particular type of service of a particular cluster group as well as set how long you are willing to wait in the discovery process till finally giving up. The first matching service that it sees "flowing" around on the UDP stream is the one it picks and sticks to for that and subsequent requests, ensuring UDP is only used when there are no other servers to talk to. + +Note that EJB clients do not need to use multipulse to find a server. If the client knows the URL of a server in the cluster, it may use it and connect directly to that server, at which point that server will share the full list of its peers. + +Multicast Servers with TCP Clients + +Note that clients do not need to use multipulse to communicate with servers. Servers can use multicast to discover each other, but clients are still free to connect to servers in the network using the server's TCP address. +[source,java] +---- +Properties p = new Properties(); +p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory"); +p.put(Context.PROVIDER_URL, "ejbd://192.168.1.30:4201"); +InitialContext remoteContext = new InitialContext(p); +---- + +When the client connects, the server will send the URLs of all the servers in the group and failover will take place normally. + +==== Multipoint + +As TCP has no real broadcast functionality to speak of, communication of who is in the network is achieved by each server having a physical connection to each other server in the network. + +To join the network, the server must be configured to know the address of at least one server in the network and connect to it. When it does both servers will exchange the full list of all the other servers each knows about. Each server will then connect to any new servers they've just learned about and repeat the processes with those new servers. The end result is that everyone has a direct connection to everyone 100% of the time, hence the made-up term "multipoint" to describe this situation of each server having multiple point-to-point connections which create a fully connected graph. + +On the client side things are similar. It needs to know the address of at least one server in the network and be able to connect to it. When it does it will get the full (and dynamically maintained) list of every server in the network. The client doesn't connect to each of those servers immediately, but rather consults the list in the event of a failover, using it to decide who to connect to next. + +The entire process is essentially the art of using a statically maintained list to bootstrap getting the more valuable dynamically maintained list. + +===== Server Configuration + +In the server this list can be specified via the conf/multipoint.properties file like so: + +[source,bash] +---- +server = org.apache.openejb.server.discovery.MultipointDiscoveryAgent +bind = 127.0.0.1 +port = 4212 +disabled = false +initialServers = 192.168.1.20:4212, 192.168.1.30:4212, 192.168.1.40:4212 +---- + +The above configuration shows the server has an port 4212 open for connections by other servers for multipoint communication. The initialServers list should be a comma separated list of other similar servers on the network. Only one of the servers listed is required to be running when this server starts up -- it is not required to list all servers in the network. + +===== Client Configuration + +Configuration in the client is similar, but note that EJB clients do not participate directly in multipoint communication and do not connect to the multipoint port. The server list is simply a list of the regular ejbd:// urls that a client normally uses to connect to a server. + +[source,java] +---- +Properties p = new Properties(); +p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory"); +p.put(Context.PROVIDER_URL, "failover:ejbd://192.168.1.20:4201,ejbd://192.168.1.30:4201"); +InitialContext remoteContext = new InitialContext(p); +---- + +Failover can work entirely driven by the server, the client does not need to be configured to participate. A client can connect as usual to the server. + +[source,java] +---- +Properties p = new Properties(); +p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory"); +p.put(Context.PROVIDER_URL, "ejbd://192.168.1.20:4201"); +InitialContext remoteContext = new InitialContext(p); +---- + +If the server at 192.168.1.20:4201 supports failover, so will the client. + +In this scenario the list of servers used for failover is supplied entirely by the server at 192.168.1.20:4201. The server could have aquired the list via multicast or multipoint (or both), but this detail is not visible to the client. + +===== Considerations + +====== Network size + +The general disadvantage of this topology is the number of connections required. The number of connections for the network of servers is equal to (n * n - n) / 2, where n is the number of servers. For example, with 5 servers you need 10 connections, with 10 servers you need 45 connections, and with 50 servers you need 1225 connections. This is of course the number of connections across the entire network, each individual server only needs n - 1 connections. + +The handling of these sockets is all asynchronous Java NIO code which allows the server to handle many connections (all of them) with one thread. From a pure threading perspective, the option is extremely efficient with just one thread to listen and broadcast to many peers. + +====== Double connect + +It is possible in this process that two servers learn of each other at the same time and each attempts to connect to the other simultaneously, resulting in two connections between the same two servers. When this happens both servers will detect the extra connection and one of the connections will be dropped and one will be kept. In practice this race condition rarely happens and can be avoided almost entirely by fanning out server startup by as little as 100 milliseconds. + +===== Recommandation + +As mentioned the initialServers is only used for bootstrapping the multipoint network. Once running, all servers will dynamically establish direct connections with each other and there is no single point of failure. + +However to ensure that the bootstrapping process can occur successfully, the initialServers property of the conf/multipoint.properties file must be set carefully and with a specific server start order in mind. Each server consults its initialServers list exactly once in the bootstrapping phase at startup, after that time connections are made dynamically. + +This means that at least one of the servers listed in initialServers must already be running when the server starts or the server might never become introduced and connected to all the other servers in the network. http://git-wip-us.apache.org/repos/asf/tomee-site-generator/blob/972cc356/src/main/jbake/content/admin/configuration/application.adoc ---------------------------------------------------------------------- diff --git a/src/main/jbake/content/admin/configuration/application.adoc b/src/main/jbake/content/admin/configuration/application.adoc new file mode 100755 index 0000000..be43cd2 --- /dev/null +++ b/src/main/jbake/content/admin/configuration/application.adoc @@ -0,0 +1,100 @@ += Application Configuration +:jbake-date: 2016-03-16 +:jbake-type: page +:jbake-status: published +:jbake-tomeepdf: + +=== `application.properties` + +This file is located in `WEB-INF` for a war and `META-INF` for an ear. + +==== `@Asynchronous` configuration + +Default pool size for `@Asynchronous` is 5. It can be very small for some applications highly relying on +asynchronism or reactive patterns. Therefore it is possible to customize it adding these entries in `application.properties`: + +[.table.table-bordered,options="header"] +|=== +| Name | Default| Description +| AsynchronousPool.Size | 5 | Core size of the pool +| AsynchronousPool.CorePoolSize | 5 | Core size of the pool (inherit its default from .Size alias) +| AsynchronousPool.MaximumPoolSize | 5 | Maximum size of the pool +| AsynchronousPool.QueueSize | 5 | Maximum size of the pool +| AsynchronousPool.KeepAliveTime | 1 minute | Thread keep alive duration +| AsynchronousPool.AllowCoreThreadTimeOut | true | Should thread timeout +| AsynchronousPool.QueueType | LINKED (or SYNCHRONOUS if size == 0) | The type of queue of the pool in ARRAY, LINKED, PRIORITY or SYNCHRONOUS (same behavior as java implementations of the same name) +| AsynchronousPool.ShutdownWaitDuration | 1 minute | How many time to wait for the pool to shutdown when undeploying the application +| AsynchronousPool.RejectedExecutionHandlerClass | - | A fully qualified name of a `java.util.concurrent.RejectedExecutionHandler` +|=== + +==== TimerService and `@Scheduled` + +`timerStore.class` allows to switch from the in memory (`org.apache.openejb.core.timer.MemoryTimerStore`) timer storage +for quartz tasks to a custom implementation (using a database or anything for instance). Constructor can take a `TransactionManager` +or nothing. + +All quartz properties prefixed with `org.apache.openejb.quartz.` (instead of `org.quartz.`) are passthrough to quartz. + +==== CDI + +The boolean `openejb.cdi.skip-resource-validation` allows to not validate resources ie `@EJB` and `@Resource` usages in CDI beans. + +All properties understood by OpenWebBeans will also be passthrough to OpenWebBeans from this location, see http://openwebbeans.apache.org/owbconfig.html[OWB config] for more details. + +==== `@WebServiceRef` + +[.table.table-bordered,options="header"] +|=== +| Name | Description +| cxf.jaxws.client.wsFeatures | Allows to set WSFeature on the client injection. Values is a list (comma separated) of resource id in resources.xml or fully qualified names. +|=== + +==== `@Stateless` + +[.table.table-bordered,options="header"] +|=== +| Name | Description +| AccessTimeout or Timeout | container timeout +| CloseTimeout | container timeout +| BackgroundStartup | Don't create instances in parallel if minimum count is > 0, default to false +|=== + +=== `resources.xml` + +`resources.xml` is a tomee.xml using application classloader. + +As `tomee.xml` it supports filtering so you can use environment variables and system properties, for instance +to use a MySQL database on OpenShift you can do: + +[source,xml] +---- +<?xml version="1.0" encoding="UTF-8"?> +<resources> + <Resource id="MySQL" aliases="myAppDataSourceName" type="DataSource"> + JdbcDriver = com.mysql.jdbc.Driver + JdbcUrl = jdbc:mysql://${OPENSHIFT_MYSQL_DB_HOST}:${OPENSHIFT_MYSQL_DB_PORT}/rmannibucau?tcpKeepAlive=true + UserName = ${OPENSHIFT_MYSQL_DB_USERNAME} + Password = ${OPENSHIFT_MYSQL_DB_PASSWORD} + ValidationQuery = SELECT 1 + ValidationInterval = 30000 + NumTestsPerEvictionRun = 5 + TimeBetweenEvictionRuns = 30 seconds + TestWhileIdle = true + MaxActive = 200 + </Resource> +</resources> +---- + +`resources.xml` supports `Resource`, `Service` and `Container`. + +==== `resources.xml` mecanism + +`resources.xml` resources are still available globally like any `tomee.xml` resource. + +The actual resource is bound in an application subtree called with the application name and a resource facade is bound +in the global naming tree to be able to route the requests depending the application. + +Typically if your application is named `myapp` and your resource id is `myresource` then instead of being registered +as `myresource`, it will get registered as `myapp/myresource`. + +If you get any ambiguity in resource name matching try to fully qualified your resource prefixing it with the application name.
