Graph Explorer

The Graph Explorer project provides a React-based web application that enables users to visualize both property graph and RDF data and explore connections between data without having to write graph queries. You can connect to a graph database that supports either the W3C RDF/SPARQL open standard or the open source Apache TinkerPop Gremlin Server.

To get started, you can deploy Graph Explorer on a local machine using Docker Desktop, or in the cloud using Amazon EC2 or a container service like Amazon ECS.

Getting Started

There are many ways to deploy and run Graph Explorer. If you are new to graph databases and Graph Explorer, we recommend that you check out the Getting Started guide.

• Local Docker Setup - A quick start guide to deploying Graph Explorer locally using the official Docker image.
• Amazon EC2 Setup - A quick start guide to setting up Graph Explorer on Amazon EC2 with Neptune.
• Local Development - A quick start guide building the Docker image from source code.
• Troubleshooting - A collection of helpful tips if you run in to issues while setting up Graph Explorer.

Minimum Recommended Versions

Graph Explorer does not block any particular versions of graph databases, but the queries used may or may not succeed based on the version of the query engine.

For Neptune databases, we recommend version 1.2.1.0 or above, which include the summary API and TinkerPop 3.6.2.

For non-Neptune databases, we recommend at least TinkerPop 3.6.

Features

Settings UI

General Settings

• Save Configuration: This action will export all the configuration data within the Graph Explorer local database. This will not store any data from the connected graph databases. However, the export may contain the shape of the schema for your databases and the connection URL.
• Load Configuration: This action will replace all the Graph Explorer configuration data you currently have with the data in the provided configuration file. This is a destructive act and can not be undone. It is strongly suggested that you perform a Save Configuration action before performing a Load Configuration action to preserve any existing configuration data.

About

In the About page you can see the version number and submit any feedback.

Connections UI

You can create and manage connections to graph databases using this feature. Connections is accessible as the first screen after deploying the application, when you click Open Connections on the top-right. Click + on the top-right to add a new connection. You can also edit and delete connections.

• Add a new connection:

  • Name: Enter a name for your connection (e.g., MyNeptuneCluster).
  • Graph Type: Choose a graph data model that corresponds to your graph database.
  • Public or proxy endpoint: Provide the publicly accessible endpoint URL for a graph database, e.g., Gremlin Server. If connecting to Amazon Neptune, then provide a proxy endpoint URL that is accessible from outside the VPC, e.g., EC2.
    • Note: For connecting to Amazon Neptune, ensure that the graph connection URL is in the format https://[NEPTUNE_ENDPOINT]:8182, and that the proxy endpoint URL is either https://[EC2_PUBLIC_HOSTNAME]:443 or http://[EC2_PUBLIC_HOSTNAME]:80, depending on the protocol used. Ensure that you don't end either of the URLs with /.
  • Using proxy server: Check this box if using a proxy endpoint.
  • Graph connection URL: Provide the endpoint for the graph database
  • AWS IAM Auth Enabled: Check this box if connecting to Amazon Neptune using IAM Auth and SigV4 signed requests
  • Service Type: Choose the service type
  • AWS Region: Specify the AWS region where the Neptune cluster is hosted (e.g., us-east-1)
  • Fetch Timeout: Specify the timeout for the fetch request

• Available Connections: Once a connection is created, this section will appear as a left-hand pane. When you create more than one connection to a graph database, you can only connect to and visualize from one graph database endpoint at a time. To select the active database, toggle the “Active” switch.

• Connection Details: Once a connection is created, this section will appear as a right-hand information pane for a selected connection. It shows details such as the connection name, graph data model type, endpoint and a summary of the graph data, such as the count of nodes, edges, and a list of node types.

• Last Synchronization: When a connection is created, Graph Explorer will perform a scan of the graph to provide summary data. To re-synchronize after data has changed on your graph, select a connection, and then click the “refresh” button next to “Last Synchronization” text.

• Data Explorer UI: Under a listed node type, you can click on the ‘>’ arrow to get to the “Data Explorer” view. This allows you to see a sample list of nodes under this type and choose one or more nodes to “Send to Explorer” for getting started quickly if you are new to the data.

Graph Explorer UI

You can search, browse, expand, customize views of your graph data using Graph Explorer, which is the main UI of this application. Once you create a connection, you can click “Open Graph Explorer” on the top-right to navigate here. There are several key features on this UI:

• Top Bar UI:

  • Toggles: You can toggle to show/hide the Graph View and/or Table View for screen real-estate management.
  • Open Connections: This takes the user back to Connections UI.

• Graph View UI: The graph visualization canvas that you can interact with. Double-click to expand the first-order neighbors of a node.

  • Layout drop-down & reset: You can display graph data using standard graph layouts in the Graph View. You can use the circular arrow to reset the physics of a layout.
  • Screenshot: Download a picture of the current window in Graph View.
  • Zoom In/Out & Clear: To help users quickly zoom in/out or clear the whole canvas in the Graph View.
  • Legend (i): This displays an informational list of icons, colors, and display names available.

• Right-hand Pane UI: There are 5-6 functions in the collapsible right-hand pane of Graph Explorer:

  • Search View allows you to search for specific nodes by filtering on node types and attributes and then adding nodes to the graph view.
  • Details View shows details about a selected node/edge such as properties etc.
  • Entities Filter is used to control the display of nodes and edges that are already expanded in the Graph View; click to hide or show nodes/edges.
  • Expand is used when expanding will result in 10+ neighbors and control the meaningful expansion. You will need to select a number as the limit to expand to. You can also add text filters for expansion.
  • Node Styling of node display options (e.g., color, icon, the property to use for the displayed name).
  • Edge Styling of edge display options (e.g., color, icon, the property to use for the displayed name).
  • Namespaces (RDF only): This RDF-specific configuration feature allows you to shorten the display of Resource URIs within the app based on auto-generated prefixes, commonly-used prefix libraries, or custom prefixes set by the user. Order of priority is set to Custom > Common > Auto-generated.

• Table View UI: This collapsible view shows a row-column display of the data in the Graph View. You can use filters in the Table to show/hide elements in the Graph View, and you can export the table view into a CSV or JSON file. The following columns are available for filtering on property graphs (RDF graphs in parentheses):

  • Node ID (Resource URI)
  • Node Type (Class)
  • Edge Type (Predicate)
  • Source ID (Source URI)
  • Source Type (Source Class)
  • Target ID (Target URI)
  • Target Type (Target Class)
  • Display Name - Set in the Node/Edge Styling panes
  • Display Description - Set in the Node/Edge Styling panes
  • Total Neighbors - Enter an integer to be used as the >= limit

• Additional Table View UI Features

  • Visibility - manually show or hide nodes or edges
  • All Nodes / All Edges (or All Resources / All Predicates) dropdown - allows you to display a list of either nodes or edges and control display/filter on them
  • Download - You can download the current Table View as a CSV or JSON file with additional customization options
  • Default columns - You can set which columns you want to display
  • Paging of rows

Connections

The Graph Explorer supports visualizing both property graphs and RDF graphs. You can connect to Amazon Neptune or you can also connect to open graph databases that implement an Apache TinkerPop Gremlin Server endpoint or the SPARQL 1.1 protocol, such as Blazegraph. For additional details on connecting to different graph databases, see Connections.

Providing a Default Connection

To provide a default connection such that initial loads of the graph explorer always result with the same starting connection, modify the docker run ... command to either take in a JSON configuration or runtime environment variables. If you provide both a JSON configuration and environmental variables, the JSON will be prioritized.

Environment Variables

These are the valid environment variables used for the default connection, their defaults, and their descriptions.

• Required:
  • PUBLIC_OR_PROXY_ENDPOINT - None - See Add a New Connection
• Optional
  • GRAPH_TYPE - None - If not specified, multiple connections will be created for every available graph type / query language. See Add a New Connection
  • USING_PROXY_SERVER - False - See Add a New Connection
  • IAM - False - See Add a New Connection
  • GRAPH_EXP_HTTPS_CONNECTION - True - Controls whether the Graph Explorer uses SSL or not
  • PROXY_SERVER_HTTPS_CONNECTION - True - Controls whether the server uses SSL or not
  • GRAPH_EXP_FETCH_REQUEST_TIMEOUT - 240000 - Controls the timeout for the fetch request. Measured in milliseconds (i.e. 240000 is 240 seconds or 4 minutes).
  • GRAPH_EXP_NODE_EXPANSION_LIMIT - None - Controls the limit for node counts and expansion queries.
• Conditionally Required:
  • Required if USING_PROXY_SERVER=True
    • GRAPH_CONNECTION_URL - None - See Add a New Connection
  • Required if USING_PROXY_SERVER=True and IAM=True
    • AWS_REGION - None - See Add a New Connection
    • SERVICE_TYPE - neptune-db, Set this as neptune-db for Neptune database or neptune-graph for Neptune Analytics.

JSON Configuration Approach

First, create a config.json file containing values for the connection attributes:

{
  "PUBLIC_OR_PROXY_ENDPOINT": "https://public-endpoint",
  "GRAPH_CONNECTION_URL": "https://cluster-cqmizgqgrsbf.us-west-2.neptune.amazonaws.com:8182",
  "USING_PROXY_SERVER": true,
  "IAM": true,
  "SERVICE_TYPE": "neptune-db",
  "AWS_REGION": "us-west-2",
  // Possible Values are "gremlin", "sparql", "openCypher"
  "GRAPH_TYPE": "gremlin",
  "GRAPH_EXP_HTTPS_CONNECTION": true,
  "PROXY_SERVER_HTTPS_CONNECTION": true,
  // Measured in milliseconds (i.e. 240000 is 240 seconds or 4 minutes)
  "GRAPH_EXP_FETCH_REQUEST_TIMEOUT": 240000,
  "GRAPH_EXP_NODE_EXPANSION_LIMIT": 500,
}

Pass the config.json file path to the docker run command.

docker run -p 80:80 -p 443:443 \
 --env HOST={hostname-or-ip-address} \
 -v /path/to/config.json:/graph-explorer/config.json \
 graph-explorer

Environment Variable Approach

Provide the desired connection variables directly to the docker run command, as follows:

docker run -p 80:80 -p 443:443 \
 --env HOST={hostname-or-ip-address} \
 --env PUBLIC_OR_PROXY_ENDPOINT=https://public-endpoint \
 --env GRAPH_TYPE=gremlin \
 --env USING_PROXY_SERVER=true \
 --env IAM=false \
 --env GRAPH_CONNECTION_URL=https://cluster-cqmizgqgrsbf.us-west-2.neptune.amazonaws.com:8182 \
 --env AWS_REGION=us-west-2 \
 --env SERVICE_TYPE=neptune-db \
 --env PROXY_SERVER_HTTPS_CONNECTION=true \
 --env GRAPH_EXP_FETCH_REQUEST_TIMEOUT=240000 \
 --env GRAPH_EXP_NODE_EXPANSION_LIMIT=500 \
 graph-explorer

Development

For development guidance, see Development.

Security

You can use the Graph Explorer to connect to a publicly accessible graph database endpoint, or connect to a proxy endpoint that redirects to a private graph database endpoint.

Graph Explorer supports the HTTPS protocol by default and provides a self-signed certificate as part of the Docker image. You can choose to use HTTP instead by changing the environment variable default settings.

HTTPS Connections

If either of the Graph Explorer or the proxy-server are served over an HTTPS connection (which it is by default), you will have to bypass the warning message from the browser due to the included certificate being a self-signed certificate. You can bypass by manually ignoring them from the browser or downloading the correct certificate and configuring them to be trusted. Alternatively, you can provide your own certificate. The following instructions can be used as an example to bypass the warnings for Chrome, but note that different browsers and operating systems will have slightly different steps.

1. Download the certificate directly from the browser. For example, if using Google Chrome, click the “Not Secure” section on the left of the URL bar and select “Certificate is not valid” to show the certificate. Then click Details tab and click Export at the bottom.
2. Once you have the certificate, you will need to trust it on your machine. For MacOS, you can open the Keychain Access app. Select System under System Keychains. Then go to File > Import Items... and import the certificate you downloaded in the previous step.
3. Once imported, select the certificate and right-click to select "Get Info". Expand the Trust section, and change the value of "When using this certificate" to "Always Trust".
4. You should now refresh the browser and see that you can proceed to open the application. For Chrome, the application will remain “Not Secure” due to the fact that this is a self-signed certificate. If you have trouble accessing Graph Explorer after completing the previous step and reloading the browser, consider running a docker restart command and refreshing the browser again.

Tip

To get rid of the “Not Secure” warning, see Using self-signed certificates on Chrome.

Authentication

Authentication for Amazon Neptune connections is enabled using the SigV4 signing protocol.

To use AWS IAM authentication, you must run requests through a proxy endpoint, such as an EC2 instance, where credentials are resolved and where requests are signed.

To set up a connection in Graph Explorer UI with AWS IAM auth enabled on Neptune, check Using Proxy-Server, then check AWS IAM Auth Enabled and type in the AWS Region where the Neptune cluster is hosted (e.g., us-east-1).

For further information on how AWS credentials are resolved in Graph Explorer, refer to this documentation.

Logging

Logs are, by default, sent to the console and will be visible as output to the docker logs. If you want to access the full set of logs, you can run docker logs {container name or id}.

The log level will be set via the LOG_LEVEL env variable at /packages/graph-explorer/.env where the possible options, from highest to lowest, are error, warn, info, debug, and trace such that error is the highest level and will only include logs labeled as errors and trace the lowest and will include any type of log.

By default, the log level is set to info and the only type of logs generated are those of error, info, or debug. If you need more detailed logs, you can change the log level from info in the default .env file to debug and the logs will begin printing the error's stack trace.

Within node-server.js, you'll notice three things.

1. A proxyLogger object - This is responsible for actually recording the logs.
2. An errorHandler - This automatically sends errors to the proxyLogger and can log extra information by adding wanted text to the error object at a key called extraInfo.
3. An endpoint called /logger - This is how you would log things from the browser. It needs a log level and message header passed and you can then expect to see the message logged at the provided log level.

Contributing Guidelines

See CONTRIBUTING for more information.

License

This project is licensed under the Apache-2.0 License.