node_gap's Introduction

Node Gap

Find the gaps in the data

Based on http://stackoverflow.com/questions/37505590/cypher-pattern-matching/

Instructions

Build it:
```
 mvn clean package
```
Copy target/node_gap-1.0-SNAPSHOT.jar to the plugins/ directory of your Neo4j server.

3a. Configure Neo4j by adding a line to conf/neo4j-server.properties on versions < 3.0:

    org.neo4j.server.thirdparty_jaxrs_classes=com.maxdemarzi=/v1

3b. Configure Neo4j by adding a line to conf/neo4j.conf on version >= 3.0:

    dbms.unmanaged_extension_classes=com.maxdemarzi=/v1

Download and copy additional jar to the plugins/ directory of your Neo4j server.

 wget http://central.maven.org/maven2/org/roaringbitmap/RoaringBitmap/0.6.18/RoaringBitmap-0.6.18.jar

Start Neo4j server.
Check that it is installed correctly over HTTP:
```
 :GET /v1/service/helloworld
```
Warm up the database (optional)
```
 :GET /v1/service/warmup
```
Run it:
```
 :GET /v1/service/gaps
```

Results should look like this:

    [
    {Points=[{id=b11}, {id=b12}, {id=b13}, {id=b14}], Start Road={id=a1}, End Road={id=a2}},
    {Points=[{id=b11}, {id=b21}, {id=b22}, {id=b23}, {id=b24}, {id=b14}], Start Road={id=a1}, End Road={id=a2}},
    {Points=[{id=b31}, {id=b41}, {id=b42}], Start Road={id=a3}, End Road={id=a4}}
    ]

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