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<div class="section" id="troubleshooting">
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<h1>Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permalink to this headline">¶</a></h1>
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<div class="section" id="intellij-issues">
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<h2>IntelliJ issues<a class="headerlink" href="#intellij-issues" title="Permalink to this headline">¶</a></h2>
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<div class="section" id="run-configurations-are-missing">
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<h3>Run configurations are missing<a class="headerlink" href="#run-configurations-are-missing" title="Permalink to this headline">¶</a></h3>
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<p>If you opened the Corda project using “Import” from the IntelliJ splash screen rather than using “Open” and then
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importing the Gradle build system from the popup bubble, then a bug in IntelliJ will cause it to wipe and recreate
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the <code class="docutils literal"><span class="pre">.idea</span></code> directory where the run configurations are stored. The fix is simple and doesn’t require you to
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re-import the project: just undelete the files! You can do that by either:</p>
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<ol class="arabic simple">
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<li>Running <code class="docutils literal"><span class="pre">git</span> <span class="pre">checkout</span> <span class="pre">.idea/runConfigurations</span></code> to restore that part of the tree to its normal state.</li>
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<li>Using the “Version Control” pane in IntelliJ to undelete the files via the GUI.</li>
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</ol>
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</div>
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<div class="section" id="if-intellij-complains-about-lack-of-an-sdk">
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<h3>If IntelliJ complains about lack of an SDK<a class="headerlink" href="#if-intellij-complains-about-lack-of-an-sdk" title="Permalink to this headline">¶</a></h3>
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<p>If on attempting to open the project (including importing Gradle project), IntelliJ refuses because an SDK was not selected,
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you may need to fix the project structure. Do this by following <a class="reference external" href="https://www.jetbrains.com/help/idea/2016.2/configuring-global-project-and-module-sdks.html">these instructions</a>. The correct JDK is often found at a path such as <code class="docutils literal"><span class="pre">jdk1.8.0_xx…/Contents/Home</span></code></p>
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<p>Ensure that you have the Project language level set at as 8. If you are having trouble selecting the correct JDK, the
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JetBrains website offers the <a class="reference external" href="https://intellij-support.jetbrains.com/hc/en-us/articles/206544879-Selecting-the-JDK-version-the-IDE-will-run-under">following guidelines</a>.</p>
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</div>
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</div>
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<div class="section" id="kotlin-issues">
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<h2>Kotlin issues<a class="headerlink" href="#kotlin-issues" title="Permalink to this headline">¶</a></h2>
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<div class="section" id="installation">
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<h3>Installation<a class="headerlink" href="#installation" title="Permalink to this headline">¶</a></h3>
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<p>There are two ways to configure Kotlin from IntelliJ. One way is via the initial project opening screen in which you will
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need to use the <code class="docutils literal"><span class="pre">Configure</span> <span class="pre">></span> <span class="pre">Plugins</span></code> tab. The other way is when you are in an open project, then you will need to
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configure it via (on Mac) <code class="docutils literal"><span class="pre">IntelliJ</span> <span class="pre">-></span> <span class="pre">Preferences</span> <span class="pre">...</span></code>, whereas on PC it is <code class="docutils literal"><span class="pre">File</span> <span class="pre">-></span> <span class="pre">Settings</span></code>. Select the plugins
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bar, confirm that Kotlin is installed and up to date.</p>
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<p>If you are having trouble installing Kotlin, first try upgrading the Kotlin plugin. At the time of writing, you can
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confirm what is the latest version of the Kotlin plugin on <a class="reference external" href="https://plugins.jetbrains.com/plugin/6954">this page</a>.</p>
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</div>
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</div>
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<div class="section" id="gradle-issues">
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<h2>Gradle issues<a class="headerlink" href="#gradle-issues" title="Permalink to this headline">¶</a></h2>
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<div class="section" id="gradle-within-intellij">
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<h3>Gradle within IntelliJ<a class="headerlink" href="#gradle-within-intellij" title="Permalink to this headline">¶</a></h3>
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<p>After you have updated your code to the latest version from git, ensure that the gradle project is imported. Although
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gradle is used via the command line, it is also integrated with IntelliJ in order for IntelliJ to determine dependencies
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and index the project correctly.</p>
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<p>When opening a project for the first time, you should see the “Unlinked Gradle project?” pop-up window in the IntelliJ top
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right corner or in a popup alert window. If you miss this, it will also appear in the “Event Log” windows which can be
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opened by clicking on “Event Log” at the bottom right of the IntelliJ window. Either way, click on “Import Gradle Project”.</p>
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<a class="reference internal image-reference" href="_images/unlinked-gradle.png"><img alt="IntelliJ Gradle Prompt" src="_images/unlinked-gradle.png" style="width: 410px; height: 50px;" /></a>
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<p>Wait for it to think and download the dependencies. After that you might have another popup titled “Unindexed remote maven repositories found.” This is a general IntelliJ question and doesn’t affect Corda, therefore you can decided to index them or not. Next click on the “green arrow” next to “All tests” pop-up on the top toolbar.</p>
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<p>The code should build, the unit tests should show as all green.</p>
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<p>If still have problems, the JetBrains website has more information on <a class="reference external" href="https://www.jetbrains.com/help/idea/2016.2/working-with-gradle-projects.html">gradle here</a>.</p>
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</div>
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<div class="section" id="gradle-via-the-cli">
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<h3>Gradle via the CLI<a class="headerlink" href="#gradle-via-the-cli" title="Permalink to this headline">¶</a></h3>
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<p>Gradle commands can also be run from the command line - further details of command line gradle can be found <a class="reference external" href="https://docs.gradle.org/current/userguide/gradle_command_line.html">here</a>.</p>
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</div>
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</div>
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<div class="section" id="doing-it-without-intellij">
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<h2>Doing it without IntelliJ<a class="headerlink" href="#doing-it-without-intellij" title="Permalink to this headline">¶</a></h2>
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<p>If you don’t want to explore or modify the code in a local IDE, you can also just use the command line and a text editor:</p>
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<ul class="simple">
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<li>First run <code class="docutils literal"><span class="pre">git</span> <span class="pre">clone</span> <span class="pre">https://github.com/corda/corda</span></code> to download Corda core source code</li>
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<li>Next ensure that you are in correct directory <code class="docutils literal"><span class="pre">cd</span> <span class="pre">corda</span></code></li>
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<li>Then you can run <code class="docutils literal"><span class="pre">./gradlew</span> <span class="pre">test</span></code> to run the unit tests.</li>
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<li>Finally remember to run <code class="docutils literal"><span class="pre">git</span> <span class="pre">pull</span></code> occasionally to upgrade the source code to the latest revision</li>
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</ul>
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