| (self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[4409],{4137:function(e,t,n){"use strict";n.d(t,{Zo:function(){return c},kt:function(){return f}});var r=n(7294);function o(e,t,n){return t in e?Object.defineProperty(e,t,{value:n,enumerable:!0,configurable:!0,writable:!0}):e[t]=n,e}function a(e,t){var n=Object.keys(e);if(Object.getOwnPropertySymbols){var r=Object.getOwnPropertySymbols(e);t&&(r=r.filter((function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable}))),n.push.apply(n,r)}return n}function u(e){for(var t=1;t<arguments.length;t++){var n=null!=arguments[t]?arguments[t]:{};t%2?a(Object(n),!0).forEach((function(t){o(e,t,n[t])})):Object.getOwnPropertyDescriptors?Object.defineProperties(e,Object.getOwnPropertyDescriptors(n)):a(Object(n)).forEach((function(t){Object.defineProperty(e,t,Object.getOwnPropertyDescriptor(n,t))}))}return e}function i(e,t){if(null==e)return{};var n,r,o=function(e,t){if(null==e)return{};var n,r,o={},a=Object.keys(e);for(r=0;r<a.length;r++)n=a[r],t.indexOf(n)>=0||(o[n]=e[n]);return o}(e,t);if(Object.getOwnPropertySymbols){var a=Object.getOwnPropertySymbols(e);for(r=0;r<a.length;r++)n=a[r],t.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(e,n)&&(o[n]=e[n])}return o}var l=r.createContext({}),s=function(e){var t=r.useContext(l),n=t;return e&&(n="function"==typeof e?e(t):u(u({},t),e)),n},c=function(e){var t=s(e.components);return r.createElement(l.Provider,{value:t},e.children)},p={inlineCode:"code",wrapper:function(e){var t=e.children;return r.createElement(r.Fragment,{},t)}},m=r.forwardRef((function(e,t){var n=e.components,o=e.mdxType,a=e.originalType,l=e.parentName,c=i(e,["components","mdxType","originalType","parentName"]),m=s(n),f=o,g=m["".concat(l,".").concat(f)]||m[f]||p[f]||a;return n?r.createElement(g,u(u({ref:t},c),{},{components:n})):r.createElement(g,u({ref:t},c))}));function f(e,t){var n=arguments,o=t&&t.mdxType;if("string"==typeof e||o){var a=n.length,u=new Array(a);u[0]=m;var i={};for(var l in t)hasOwnProperty.call(t,l)&&(i[l]=t[l]);i.originalType=e,i.mdxType="string"==typeof e?e:o,u[1]=i;for(var s=2;s<a;s++)u[s]=n[s];return r.createElement.apply(null,u)}return r.createElement.apply(null,n)}m.displayName="MDXCreateElement"},6261:function(e,t,n){"use strict";var r=n(7294),o=n(4184),a=n.n(o);t.Z=function(e){var t=e.children,n=e.classNames,o=e.fill,u=e.icon,i=e.type,l=null;switch(i){case"danger":l="alert-triangle";break;case"success":l="check-circle";break;case"warning":l="alert-triangle";break;default:l="info"}return r.createElement("div",{className:a()(n,"alert","alert--"+i,{"alert--fill":o,"alert--icon":!1!==u}),role:"alert"},!1!==u&&r.createElement("i",{className:a()("feather","icon-"+(u||l))}),t)}},5867:function(e,t,n){"use strict";n.r(t),n.d(t,{frontMatter:function(){return l},contentTitle:function(){return s},metadata:function(){return c},toc:function(){return p},default:function(){return f}});var r=n(7462),o=n(3366),a=(n(7294),n(4137)),u=n(6261),i=["components"],l={title:"Java",sidebar_label:"java",description:"Pinot Java Client",draft:!0},s=void 0,c={unversionedId:"user-guide/clients/java",id:"user-guide/clients/java",isDocsHomePage:!1,title:"Java",description:"Pinot Java Client",source:"@site/docs/user-guide/clients/java.md",sourceDirName:"user-guide/clients",slug:"/user-guide/clients/java",permalink:"/docs/user-guide/clients/java",editUrl:"https://github.com/apache/pinot/edit/master/website/docs/user-guide/clients/java.md",version:"current",frontMatter:{title:"Java",sidebar_label:"java",description:"Pinot Java Client",draft:!0}},p=[],m={toc:p};function f(e){var t=e.components,n=(0,o.Z)(e,i);return(0,a.kt)("wrapper",(0,r.Z)({},m,n,{components:t,mdxType:"MDXLayout"}),(0,a.kt)("p",null,"The java client can be found in pinot-clients/pinot-java-client. Here's an example of how to use the pinot-java-client to query Pinot."),(0,a.kt)("pre",null,(0,a.kt)("code",{parentName:"pre",className:"language-java"},'import org.apache.pinot.client.Connection;\nimport org.apache.pinot.client.ConnectionFactory;\nimport org.apache.pinot.client.Request;\nimport org.apache.pinot.client.ResultSetGroup;\nimport org.apache.pinot.client.ResultSet;\n\n/**\n * Demonstrates the use of the pinot-client to query Pinot from Java\n */\npublic class PinotClientExample {\n\n public static void main(String[] args) {\n\n // pinot connection\n String zkUrl = "localhost:2181";\n String pinotClusterName = "PinotCluster";\n Connection pinotConnection = ConnectionFactory.fromZookeeper(zkUrl + "/" + pinotClusterName);\n\n String query = "SELECT COUNT(*) FROM myTable GROUP BY foo";\n\n // set queryType=sql for querying the sql endpoint\n Request pinotClientRequest = new Request("sql", query);\n ResultSetGroup pinotResultSetGroup = pinotConnection.execute(pinotClientRequest);\n ResultSet resultTableResultSet = pinotResultSetGroup.getResultSet(0);\n\n int numRows = resultTableResultSet.getRowCount();\n int numColumns = resultTableResultSet.getColumnCount();\n String columnValue = resultTableResultSet.getString(0, 1);\n String columnName = resultTableResultSet.getColumnName(1);\n\n System.out.println("ColumnName: " + columnName + ", ColumnValue: " + columnValue);\n }\n}\n')),(0,a.kt)("p",null,"Connections to Pinot are created using the ConnectionFactory class' utility methods to create connections to a Pinot cluster given a Zookeeper URL, a Java Properties object or a list of broker addresses to connect to."),(0,a.kt)("pre",null,(0,a.kt)("code",{parentName:"pre",className:"language-java"},'Connection connection = ConnectionFactory.fromZookeeper\n ("some-zookeeper-server:2191/zookeeperPath");\n\nConnection connection = ConnectionFactory.fromProperties("demo.properties");\n\nConnection connection = ConnectionFactory.fromHostList\n ("some-server:1234", "some-other-server:1234", ...);\n')),(0,a.kt)("p",null,"Queries can be sent directly to the Pinot cluster using the ",(0,a.kt)("inlineCode",{parentName:"p"},"Connection.execute(org.apache.pinot.client.Request)")," and ",(0,a.kt)("inlineCode",{parentName:"p"},"Connection.executeAsync(org.apache.pinot.client.Request)")," methods of Connection:"),(0,a.kt)("pre",null,(0,a.kt)("code",{parentName:"pre",className:"language-java"},'ResultSetGroup resultSetGroup =\n connection.execute(new Request("sql", "select * from foo..."));\n// OR\nFuture<ResultSetGroup> futureResultSetGroup =\n connection.executeAsync(new Request("sql", "select * from foo..."));\n')),(0,a.kt)("p",null,"Queries can also use a ",(0,a.kt)("inlineCode",{parentName:"p"},"PreparedStatement")," to escape query parameters:"),(0,a.kt)("pre",null,(0,a.kt)("code",{parentName:"pre",className:"language-java"},'PreparedStatement statement =\n connection.prepareStatement(new Request("sql", "select * from foo where a = ?"));\nstatement.setString(1, "bar");\n\nResultSetGroup resultSetGroup = statement.execute();\n// OR\nFuture<ResultSetGroup> futureResultSetGroup = statement.executeAsync();\n')),(0,a.kt)("p",null,"Results can be obtained with the various get methods in the first ResultSet, obtained through the getResultSet(int) method:"),(0,a.kt)("pre",null,(0,a.kt)("code",{parentName:"pre",className:"language-java"},'Request request = new Request("sql", "select foo, bar from baz where quux = \'quuux\'");\nResultSetGroup resultSetGroup = connection.execute(request);\nResultSet resultTableResultSet = pinotResultSetGroup.getResultSet(0);\n\nfor (int i = 0; i < resultSet.getRowCount(); ++i) {\n System.out.println("foo: " + resultSet.getString(i, 0));\n System.out.println("bar: " + resultSet.getInt(i, 1));\n}\n')),(0,a.kt)(u.Z,{type:"info",mdxType:"Alert"}," The examples for the sections below this note, are for querying the PQL endpoint, which is deprecated and will be deleted soon. 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