Neo4j stored procedures for Windows

Reading time ~1 minute

In the previous post I’ve written about new features in Neo4j. One of the new game changing functions were stored procedures. But, as I experienced, getting them to run on a Windows / .NET environment wasn’t that easy, and I was seeing “There is no procedure with the name …” more often then I wished for. So here is a short how to. Hope to save you some googling.

  1. JDK

    1. Download and install JDK 8.x from here. I’ve used 8u92 version.

    2. Set environment variable for JAVA_HOME pointing to JDK install location (in my case C:\Program Files\Java\jdk1.8.0_92). This can be done with some PowerShell:

      [Environment]::SetEnvironmentVariable("JAVA_HOME","C:\Program Files\Java\jdk1.8.0_92","Machine")

    The last parameter sets it as a machine level variable (visible for all users).

  2. Install Maven

    1. Download Maven from the official site
    2. Unzip it to a directory. In my case C:\Program Files\Maven
    3. Add environment variables for M2_HOME and MAVEN_HOME.
      [Environment]::SetEnvironmentVariable("M2_HOME","C:\Program Files\Maven","Machine")
      [Environment]::SetEnvironmentVariable("MAVEN_HOME","C:\Program Files\Maven","Machine")
    4. Update PATH environment.

      if($path -notcontains "%M2_HOME%\bin"){
         $newPath=$path+";"+ "%M2_HOME%\bin"
    5. Check. Run mvn -version in a new cmd.
  3. Neo4j

    1. If you haven’t, download the new Neo4j version (stored procedures are available in version 3.0 and up) from here.
    2. Add NEO4J_HOME environment path for Neo4j folder(in my case C:\Program Files\Neo4j CE 3.0.0).
      [Environment]::SetEnvironmentVariable("NEO4J_HOME","C:\Program Files\Neo4j CE 3.0.0","Machine")
    3. Clone neo4j-apoc-procedures. Again some PowerShell - should be executed with admin privileges:
      git clone
      cd neo4j-apoc-procedures
      mvn clean install
      copy target/apoc-1.0.0-SNAPSHOT.jar $Env:NEO4J_HOME/plugins/
    4. Edit Neo4j config.

      Open %userprofile%\AppData\Roaming\Neo4j Community Edition and add this entry (change the path if yours was different then in point 3.1):

      dbms.directories.plugins=c:/Program\ Files/Neo4j\ CE\ 3.0.0/plugins

    5. Restart Neo4j (if it was running)
    6. Check if it is OK and enter for example call'search') in Neo4j cmd. And this should appear: Neo4j stored procedures working

Could not load file or assembly or one of its dependencies.

This post is an analysis of 'Could not load file or assembly'. Why it happens and how to diagnose it Continue reading

Understanding OutOfMemoryException

Published on January 02, 2017