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It consists of the following sections:</p></div> +<div class="section"> +<h4>Graph Database Configs<a name="Graph_Database_Configs"></a></h4></div> +<div class="section"> +<h5>Graph persistence engine<a name="Graph_persistence_engine"></a></h5> +<p><a href="http://s3.thinkaurelius.com/docs/titan/0.5.4/titan-config-ref.html";>link</a> for more details. The example below uses BerkeleyDBJE.</p> +<div class="source"> +<pre> +atlas.graph.storage.backend=berkeleyje +atlas.graph.storage.directory=data/berkley + +</pre></div></div> +<div class="section"> +<h5>Graph Search Index<a name="Graph_Search_Index"></a></h5> +<p>This section sets up the graph db - titan - to use an search indexing system. The example configuration below setsup to use an embedded Elastic search indexing system.</p> +<div class="source"> +<pre> +atlas.graph.index.search.backend=elasticsearch +atlas.graph.index.search.directory=data/es +atlas.graph.index.search.elasticsearch.client-only=false +atlas.graph.index.search.elasticsearch.local-mode=true +atlas.graph.index.search.elasticsearch.create.sleep=2000 + +</pre></div></div> +<div class="section"> +<h4>Hive Lineage Configs<a name="Hive_Lineage_Configs"></a></h4> +<p>The higher layer services like hive lineage, schema, etc. are driven by the type system and this section encodes the specific types for the hive data model.</p> +<p># This models reflects the base super types for Data and Process</p> +<div class="source"> +<pre> +atlas.lineage.hive.table.type.name=DataSet +atlas.lineage.hive.process.type.name=Process +atlas.lineage.hive.process.inputs.name=inputs +atlas.lineage.hive.process.outputs.name=outputs + +## Schema +atlas.lineage.hive.table.schema.query=hive_table where name=?, columns + +</pre></div></div> +<div class="section"> +<h4>Security Properties<a name="Security_Properties"></a></h4></div> +<div class="section"> +<h5>SSL config<a name="SSL_config"></a></h5> +<p>The following property is used to toggle the SSL feature.</p> +<div class="source"> +<pre> +atlas.enableTLS=false + +</pre></div></div> + </div> + </div> + + <hr/> + + <footer> + <div class="container"> + <div class="row span12">Copyright © 2015 + <a href="http://www.apache.org";>Apache Software Foundation</a>. + All Rights Reserved. + + </div> + + + <p id="poweredBy" class="pull-right"> + <a href="http://maven.apache.org/"; 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To override this set environment variable METADATA_CONF to the path of the conf dir.</p> +<p>atlas-env.sh has been added to the Atlas conf. This file can be used to set various environment variables that you need for you services. In addition you can set any other environment variables you might need. This file will be sourced by atlas scripts before any commands are executed. The following environment variables are available to set.</p> +<div class="source"> +<pre> +# The java implementation to use. If JAVA_HOME is not found we expect java and jar to be in path +#export JAVA_HOME= + +# any additional java opts you want to set. This will apply to both client and server operations +#export METADATA_OPTS= + +# any additional java opts that you want to set for client only +#export METADATA_CLIENT_OPTS= + +# java heap size we want to set for the client. Default is 1024MB +#export METADATA_CLIENT_HEAP= + +# any additional opts you want to set for atlas service. +#export METADATA_SERVER_OPTS= + +# java heap size we want to set for the atlas server. Default is 1024MB +#export METADATA_SERVER_HEAP= + +# What is is considered as atlas home dir. Default is the base locaion of the installed software +#export METADATA_HOME_DIR= + +# Where log files are stored. Defatult is logs directory under the base install location +#export METADATA_LOG_DIR= + +# Where pid files are stored. Defatult is logs directory under the base install location +#export METADATA_PID_DIR= + +# where the atlas titan db data is stored. Defatult is logs/data directory under the base install location +#export METADATA_DATA_DIR= + +# Where do you want to expand the war file. By Default it is in /server/webapp dir under the base install dir. +#export METADATA_EXPANDED_WEBAPP_DIR= + +</pre></div> +<p><b>NOTE for Mac OS users</b></p> +<div class="source"> +<pre> +If you are using a Mac OS, you will need to configure the METADATA_SERVER_OPTS (explained above). + +In {package dir}/conf/atlas-env.sh uncomment the following line +#export METADATA_SERVER_OPTS= + +and change it to look as below +export METADATA_SERVER_OPTS="-Djava.awt.headless=true -Djava.security.krb5.realm= -Djava.security.krb5.kdc=" + +</pre></div> +<p><b>Starting Atlas Server</b></p> +<div class="source"> +<pre> +bin/atlas_start.py [-port <port>] + +</pre></div> +<p>By default, * To change the port, use -port option. * atlas server starts with conf from {package dir}/conf. To override this (to use the same conf with multiple atlas upgrades), set environment variable METADATA_CONF to the path of conf dir</p> +<p><b>Using Atlas</b></p> +<div class="source"> +<pre> +* Verify if the server is up and running + curl -v http://localhost:21000/api/atlas/admin/version + {"Version":"v0.1"} + +* List the types in the repository + curl -v http://localhost:21000/api/atlas/types + {"list":["biginteger","short","byte","int","string","bigdecimal","boolean","date","double","long","float"],"requestId":"902580786@qtp-1479771328-0"} + +* List the instances for a given type + curl -v http://localhost:21000/api/atlas/entities?type=hive_table + {"requestId":"788558007@qtp-44808654-5","list":["cb9b5513-c672-42cb-8477-b8f3e537a162","ec985719-a794-4c98-b98f-0509bd23aac0","48998f81-f1d3-45a2-989a-223af5c1ed6e","a54b386e-c759-4651-8779-a099294244c4"]} + + curl -v http://localhost:21000/api/atlas/entities/list/hive_db + +* Search for entities (instances) in the repository + curl -v http://localhost:21000/api/atlas/discovery/search/dsl?query="from hive_table" + +</pre></div> +<p><b>Dashboard</b></p> +<p>Once atlas is started, you can view the status of atlas entities using the Web-based dashboard. \You can open your browser at the corresponding port to use the web UI.</p> +<p><b>Stopping Atlas Server</b></p> +<div class="source"> +<pre> +bin/atlas_stop.py + +</pre></div></div> + </div> + </div> + + <hr/> + + <footer> + <div class="container"> + <div class="row span12">Copyright © 2015 + <a href="http://www.apache.org";>Apache Software Foundation</a>. + All Rights Reserved. + + </div> + + + <p id="poweredBy" class="pull-right"> + <a href="http://maven.apache.org/"; 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It also adds example entities along with traits as shown in the instance graph below.</p></div> +<div class="section"> +<h4>Example Type Definitions<a name="Example_Type_Definitions"></a></h4> +<p><img src="guide-class-diagram.png" alt="" /></p></div> +<div class="section"> +<h4>Example Instance Graph<a name="Example_Instance_Graph"></a></h4> +<p><img src="guide-instance-graph.png" alt="" /></p></div> +<div class="section"> +<h3>Running the example<a name="Running_the_example"></a></h3> +<p>This will add sample types and instances along with traits as shown in the instance graph above.</p> +<p></p> +<ul> +<li>bin/quick-start.sh</li></ul></div> +<div class="section"> +<h3>Dashboard<a name="Dashboard"></a></h3> +<p>A simple dashboard with search is available.</p> +<p></p> +<ul> +<li><a class="externalLink" href="http://localhost:21000/dashboard";>http://localhost:21000/dashboard</a></li></ul></div> + </div> + </div> + + <hr/> + + <footer> + <div class="container"> + <div class="row span12">Copyright © 2015 + <a href="http://www.apache.org";>Apache Software Foundation</a>. + All Rights Reserved. + + </div> + + + <p id="poweredBy" class="pull-right"> + <a href="http://maven.apache.org/"; 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The grammar for the DSL is below.</p> +<div class="source"> +<pre> +queryWithPath: query ~ opt(WITHPATH) + +query: rep1sep(singleQuery, opt(COMMA)) + +singleQuery: singleQrySrc ~ opt(loopExpression) ~ opt(selectClause) + +singleQrySrc = FROM ~ fromSrc ~ opt(WHERE) ~ opt(expr ^? notIdExpression) | + WHERE ~ (expr ^? notIdExpression) | + expr ^? notIdExpression | + fromSrc ~ opt(WHERE) ~ opt(expr ^? notIdExpression) + +fromSrc: identifier ~ AS ~ alias | identifier + +loopExpression: LOOP ~ (LPAREN ~> query <~ RPAREN) ~ opt(intConstant <~ TIMES) ~ opt(AS ~> alias) + +selectClause: SELECT ~ rep1sep(selectExpression, COMMA) + +selectExpression: expr ~ opt(AS ~> alias) + +expr: compE ~ opt(rep(exprRight)) + +exprRight: (AND | OR) ~ compE + +compE: + arithE ~ (LT | LTE | EQ | NEQ | GT | GTE) ~ arithE | + arithE ~ (ISA | IS) ~ ident | + arithE ~ HAS ~ ident | + arithE + +arithE: multiE ~ opt(rep(arithERight)) + +arithERight: (PLUS | MINUS) ~ multiE + +multiE: atomE ~ opt(rep(multiERight)) + +multiERight: (STAR | DIV) ~ atomE + +atomE: literal | identifier | LPAREN ~> expr <~ RPAREN + +identifier: rep1sep(ident, DOT) + +alias: ident | stringLit + +literal: booleanConstant | + intConstant | + longConstant | + floatConstant | + doubleConstant | + stringLit + +</pre></div> +<p>Grammar language: {noformat} opt(a) => a is optional ~ => a combinator. 'a ~ b' means a followed by b rep => zero or more rep1sep => one or more, separated by second arg. {noformat}</p> +<p>Language Notes:</p> +<ul> +<li>A <b><a href="./SingleQuery.html">SingleQuery</a></b> expression can be used to search for entities of a <i>Trait</i> or <i>Class</i>.</li></ul>Entities can be filtered based on a 'Where Clause' and Entity Attributes can be retrieved based on a 'Select Clause'. +<ul> +<li>An Entity Graph can be traversed/joined by combining one or more <a href="./SingleQueries.html">SingleQueries</a>.</li> +<li>An attempt is made to make the expressions look SQL like by accepting keywords "SELECT",</li></ul>"FROM", and "WHERE"; but these are optional and users can simply think in terms of Entity Graph Traversals. +<ul> +<li>The transitive closure of an Entity relationship can be expressed via the <i>Loop</i> expression. A</li></ul><i>Loop</i> expression can be any traversal (recursively a query) that represents a <i>Path</i> that ends in an Entity of the same <i>Type</i> as the starting Entity. +<ul> +<li>The <i><a href="./WithPath.html">WithPath</a></i> clause can be used with transitive closure queries to retrieve the Path that</li></ul>connects the two related Entities. (We also provide a higher level interface for Closure Queries see scaladoc for 'org.apache.metadata.query.ClosureQuery') +<ul> +<li>There are couple of Predicate functions different from SQL: +<ul> +<li><i>is</i> or <i>isa</i>can be used to filter Entities that have a particular Trait.</li> +<li><i>has</i> can be used to filter Entities that have a value for a particular Attribute.</li></ul></li></ul></div> +<div class="section"> +<h4>DSL Examples<a name="DSL_Examples"></a></h4> +<p></p> +<ul> +<li>from DB</li> +<li>DB where name="Reporting" select name, owner</li> +<li>DB has name</li> +<li>DB is <a href="./JdbcAccess.html">JdbcAccess</a></li> +<li>Column where Column isa PII</li> +<li>Table where name="sales_fact", columns</li> +<li>Table where name="sales_fact", columns as column select column.name, column.dataType, column.comment</li></ul></div> +<div class="section"> +<h3>Full-text Search<a name="Full-text_Search"></a></h3> +<p>Atlas also exposes a lucene style full-text search capability.</p></div> + </div> + </div> + + <hr/> + + <footer> + <div class="container"> + <div class="row span12">Copyright © 2015 + <a href="http://www.apache.org";>Apache Software Foundation</a>. + All Rights Reserved. + + </div> + + + <p id="poweredBy" class="pull-right"> + <a href="http://maven.apache.org/"; title="Built by Maven" class="poweredBy"> + <img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /> + </a> + </p> + + </div> + </footer> + </body> +</html>
