Re: [Neo] Connecting to Neo4j DB from ActionScript
Hi,
After a lot of try/miss attempts, finally I've created both the server and
client sides. I have some problems:
1. I don't know how to manage shutting down stuffs (GraphDatabaseService and
IndexService) in the client side.
2. When I run the flex page for the first time (after restarting the Tomcat),
everything is ok. But when I run it again or refresh the page, I have a Error:
An unknown exception occurred while creating an instance of type
'wikipedia.wnng.Connector'. - It maybe related to the first item!
3. The source codes are attached, would you please review them or share some
codes that I can solve the problem?
Kind regards,
Amir
--- On Sat, 3/13/10, Rick Bullotta rick.bullo...@burningskysoftware.com wrote:
From: Rick Bullotta rick.bullo...@burningskysoftware.com
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
To: 'Neo user discussions' user@lists.neo4j.org
Date: Saturday, March 13, 2010, 9:57 AM
Hi, Amir.
Most of what we're doing is fairly specific to our domain model (each node
has a type and a name property) and technology landscape (WebORB backend,
for example), but there are some guidelines I can share with you to help.
1) You'll want to create a viewer based on ExtendedFlexGraph, which brings
with it a lot of very useful filtering/searching/layout capabilities that
the base FlexGraph class does not have
2) You'll want to create a custom node renderer and a custom arc
(relationship) renderer. We overrode the newInstance(), set data, and
addToolTipValues() methods to allow us to display Neo node and relationship
properties in the mouse-over event, and to provide custom text to display on
each node/relationship. The Neo relationship model fits nicely with Flexviz
in that an arc in Flexviz has a type that corresponds to the
RelationshipType in neo. The Neo node model also fits reasonably well,
with the concept of an id (arcs have id's also).
3) You'll need a back-end service (servlet or other) to get data to your
Flex front end. We're using WebORB, which allows a high performance bridge
to the Flex app using Flex remoting (and a binary protocol), but you could
do the same thing with a Flex HTTPService and by outputting XML from a
servlet, perhaps in some variant of GraphML. In the handler for a response
for the server, you'll then want to parse the result and create the graph
model inside Flexviz. Here's the code we use (realize that our result
structure is a native object, but the same approach could be used with
XML).
neoModel = response.result as
ArrayCollection;
graph.nodeRenderer = new NeoNodeRenderer();
graph.arcRenderer = new
NeoRelationshipRenderer();
model = new DefaultGraphModel();
var node:Object;
var edge:Object;
for each(node in neoModel) {
var graphNode:DefaultGraphNode = new
DefaultGraphNode(node.id, node.type, node.name, node);
model.addNode(graphNode);
}
for each(node in neoModel) {
for each(edge in node.edges) {
var fromItem: IGraphNode =
model.getNode(edge.fromNode);
var toItem: IGraphNode =
model.getNode(edge.toNode);
var arc:DefaultGraphArc =
new DefaultGraphArc(edge.id, fromItem, toItem, edge.type, edge, false,
true);
model.addArc(arc);
}
}
graph.model = model;
var layout:ILayoutAlgorithm = new
RadialLayoutAlgorithm();
graph.runLayout(layout);
4) On the server side, we created a class that handles client requests, with
a single parameter corresponding to the root node of the request. In our
case, we don't want to display the entire Neo4J graph - only nodes one
relationship away from a specified node (similar to Neoclipse's default
behavior)
5) On the client, we created a double click handler for the graph so that
double-clicking a node reinvokes the service with a new root node and
redisplays the graph. It is easy to implement a go back function by
keeping track of the previous root node id's in a stack.
Hope that helps!
Rick
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
Behalf Of Amir Hossein Jadidinejad
Sent: Saturday, March 13, 2010 12:04 AM
To: Neo user discussions
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Rick,
It's really interesting. Would you please share your experiments with us?,
Some example, source code,...
Greatly appreciate your help.
Kind regards,
Amir
--- On Fri, 3/12/10, Rick Bullotta rick.bullo...@burningskysoftware.com
wrote:
From: Rick Bullotta rick.bullo...@burningskysoftware.com
Subject: Re: [Neo] Connecting
Re: [Neo] Connecting to Neo4j DB from ActionScript
I would not use a Runtime shutdown hook from within Tomcat. I would
use a ServletContextListener (override the contextInitialized and
contextDestroyed events), and create singletons for the
GraphDatabaseService/LuceneIndex when the webapp initializes, and
shut them down when the webapp is destroyed. You can only have a
single instance of the GraphDatabaseService active at a time.
Those changes should get you working.
Rick
Original Message
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
From: Amir Hossein Jadidinejad amir.jad...@yahoo.com
Date: Sat, April 10, 2010 2:48 pm
To: Neo user discussions user@lists.neo4j.org
Cc: rick.bullo...@burningskysoftware.com
Hi,
After a lot of try/miss attempts, finally I've created both the server
and client sides. I have some problems:
1. I don't know how to manage shutting down stuffs
(GraphDatabaseService and IndexService) in the client side.
2. When I run the flex page for the first time (after restarting the
Tomcat), everything is ok. But when I run it again or refresh the page,
I have a Error: An unknown exception occurred while creating an
instance of type 'wikipedia.wnng.Connector'. - It maybe related to
the first item!
3. The source codes are attached, would you please review them or share
some codes that I can solve the problem?
Kind regards,
Amir
--- On Sat, 3/13/10, Rick Bullotta
rick.bullo...@burningskysoftware.com wrote:
From: Rick Bullotta rick.bullo...@burningskysoftware.com
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
To: 'Neo user discussions' user@lists.neo4j.org
Date: Saturday, March 13, 2010, 9:57 AM
Hi, Amir.
Most of what we're doing is fairly specific to our domain model (each
node
has a type and a name property) and technology landscape (WebORB
backend,
for example), but there are some guidelines I can share with you to
help.
1) You'll want to create a viewer based on ExtendedFlexGraph, which
brings
with it a lot of very useful filtering/searching/layout capabilities
that
the base FlexGraph class does not have
2) You'll want to create a custom node renderer and a custom arc
(relationship) renderer. We overrode the newInstance(), set data, and
addToolTipValues() methods to allow us to display Neo node and
relationship
properties in the mouse-over event, and to provide custom text to
display on
each node/relationship. The Neo relationship model fits nicely with
Flexviz
in that an arc in Flexviz has a type that corresponds to the
RelationshipType in neo. The Neo node model also fits reasonably
well,
with the concept of an id (arcs have id's also).
3) You'll need a back-end service (servlet or other) to get data to
your
Flex front end. We're using WebORB, which allows a high performance
bridge
to the Flex app using Flex remoting (and a binary protocol), but you
could
do the same thing with a Flex HTTPService and by outputting XML from a
servlet, perhaps in some variant of GraphML. In the handler for a
response
for the server, you'll then want to parse the result and create the
graph
model inside Flexviz. Here's the code we use (realize that our result
structure is a native object, but the same approach could be used
with
XML).
neoModel = response.result as
ArrayCollection;
graph.nodeRenderer = new NeoNodeRenderer();
graph.arcRenderer = new
NeoRelationshipRenderer();
model = new DefaultGraphModel();
var node:Object;
var edge:Object;
for each(node in neoModel) {
var graphNode:DefaultGraphNode = new
DefaultGraphNode(node.id, node.type, node.name, node);
model.addNode(graphNode);
}
for each(node in neoModel) {
for each(edge in node.edges) {
var fromItem: IGraphNode =
model.getNode(edge.fromNode);
var toItem: IGraphNode =
model.getNode(edge.toNode);
var arc:DefaultGraphArc =
new DefaultGraphArc(edge.id, fromItem, toItem, edge.type, edge, false,
true);
model.addArc(arc);
}
}
graph.model = model;
var layout:ILayoutAlgorithm = new
RadialLayoutAlgorithm();
graph.runLayout(layout);
4) On the server side, we created a class that handles client requests,
with
a single parameter corresponding to the root node of the request. In
our
case, we don't want to display the entire Neo4J graph - only nodes one
relationship away from a specified node (similar to Neoclipse's default
Re: [Neo] Connecting to Neo4j DB from ActionScript
Hi, Amir.
Most of what we're doing is fairly specific to our domain model (each node
has a type and a name property) and technology landscape (WebORB backend,
for example), but there are some guidelines I can share with you to help.
1) You'll want to create a viewer based on ExtendedFlexGraph, which brings
with it a lot of very useful filtering/searching/layout capabilities that
the base FlexGraph class does not have
2) You'll want to create a custom node renderer and a custom arc
(relationship) renderer. We overrode the newInstance(), set data, and
addToolTipValues() methods to allow us to display Neo node and relationship
properties in the mouse-over event, and to provide custom text to display on
each node/relationship. The Neo relationship model fits nicely with Flexviz
in that an arc in Flexviz has a type that corresponds to the
RelationshipType in neo. The Neo node model also fits reasonably well,
with the concept of an id (arcs have id's also).
3) You'll need a back-end service (servlet or other) to get data to your
Flex front end. We're using WebORB, which allows a high performance bridge
to the Flex app using Flex remoting (and a binary protocol), but you could
do the same thing with a Flex HTTPService and by outputting XML from a
servlet, perhaps in some variant of GraphML. In the handler for a response
for the server, you'll then want to parse the result and create the graph
model inside Flexviz. Here's the code we use (realize that our result
structure is a native object, but the same approach could be used with
XML).
neoModel = response.result as
ArrayCollection;
graph.nodeRenderer = new NeoNodeRenderer();
graph.arcRenderer = new
NeoRelationshipRenderer();
model = new DefaultGraphModel();
var node:Object;
var edge:Object;
for each(node in neoModel) {
var graphNode:DefaultGraphNode = new
DefaultGraphNode(node.id, node.type, node.name, node);
model.addNode(graphNode);
}
for each(node in neoModel) {
for each(edge in node.edges) {
var fromItem: IGraphNode =
model.getNode(edge.fromNode);
var toItem: IGraphNode =
model.getNode(edge.toNode);
var arc:DefaultGraphArc =
new DefaultGraphArc(edge.id, fromItem, toItem, edge.type, edge, false,
true);
model.addArc(arc);
}
}
graph.model = model;
var layout:ILayoutAlgorithm = new
RadialLayoutAlgorithm();
graph.runLayout(layout);
4) On the server side, we created a class that handles client requests, with
a single parameter corresponding to the root node of the request. In our
case, we don't want to display the entire Neo4J graph - only nodes one
relationship away from a specified node (similar to Neoclipse's default
behavior)
5) On the client, we created a double click handler for the graph so that
double-clicking a node reinvokes the service with a new root node and
redisplays the graph. It is easy to implement a go back function by
keeping track of the previous root node id's in a stack.
Hope that helps!
Rick
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
Behalf Of Amir Hossein Jadidinejad
Sent: Saturday, March 13, 2010 12:04 AM
To: Neo user discussions
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Rick,
It's really interesting. Would you please share your experiments with us?,
Some example, source code,...
Greatly appreciate your help.
Kind regards,
Amir
--- On Fri, 3/12/10, Rick Bullotta rick.bullo...@burningskysoftware.com
wrote:
From: Rick Bullotta rick.bullo...@burningskysoftware.com
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
To: 'Neo user discussions' user@lists.neo4j.org
Date: Friday, March 12, 2010, 6:27 PM
Amir, I'm doing something similar (also with Flexviz). I looked at a number
of other Flex graph visualization libraries (Kapit, SpringGraph, YFiles,
Raviz/Birdeye, Flare) and definitely preferred Flexviz to the others. It
seems quite extensible/customizable as well.
I'm using Flex/Flash remoting between
Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Rick,
Greatly appreciate your help. Let me some time to learn about the following
technologies!, I'll send back to you asap.
Thanks again.
Kind regards,
Amir
--- On Sat, 3/13/10, Rick Bullotta rick.bullo...@burningskysoftware.com wrote:
From: Rick Bullotta rick.bullo...@burningskysoftware.com
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
To: 'Neo user discussions' user@lists.neo4j.org
Date: Saturday, March 13, 2010, 9:57 AM
Hi, Amir.
Most of what we're doing is fairly specific to our domain model (each node
has a type and a name property) and technology landscape (WebORB backend,
for example), but there are some guidelines I can share with you to help.
1) You'll want to create a viewer based on ExtendedFlexGraph, which brings
with it a lot of very useful filtering/searching/layout capabilities that
the base FlexGraph class does not have
2) You'll want to create a custom node renderer and a custom arc
(relationship) renderer. We overrode the newInstance(), set data, and
addToolTipValues() methods to allow us to display Neo node and relationship
properties in the mouse-over event, and to provide custom text to display on
each node/relationship. The Neo relationship model fits nicely with Flexviz
in that an arc in Flexviz has a type that corresponds to the
RelationshipType in neo. The Neo node model also fits reasonably well,
with the concept of an id (arcs have id's also).
3) You'll need a back-end service (servlet or other) to get data to your
Flex front end. We're using WebORB, which allows a high performance bridge
to the Flex app using Flex remoting (and a binary protocol), but you could
do the same thing with a Flex HTTPService and by outputting XML from a
servlet, perhaps in some variant of GraphML. In the handler for a response
for the server, you'll then want to parse the result and create the graph
model inside Flexviz. Here's the code we use (realize that our result
structure is a native object, but the same approach could be used with
XML).
neoModel = response.result as
ArrayCollection;
graph.nodeRenderer = new NeoNodeRenderer();
graph.arcRenderer = new
NeoRelationshipRenderer();
model = new DefaultGraphModel();
var node:Object;
var edge:Object;
for each(node in neoModel) {
var graphNode:DefaultGraphNode = new
DefaultGraphNode(node.id, node.type, node.name, node);
model.addNode(graphNode);
}
for each(node in neoModel) {
for each(edge in node.edges) {
var fromItem: IGraphNode =
model.getNode(edge.fromNode);
var toItem: IGraphNode =
model.getNode(edge.toNode);
var arc:DefaultGraphArc =
new DefaultGraphArc(edge.id, fromItem, toItem, edge.type, edge, false,
true);
model.addArc(arc);
}
}
graph.model = model;
var layout:ILayoutAlgorithm = new
RadialLayoutAlgorithm();
graph.runLayout(layout);
4) On the server side, we created a class that handles client requests, with
a single parameter corresponding to the root node of the request. In our
case, we don't want to display the entire Neo4J graph - only nodes one
relationship away from a specified node (similar to Neoclipse's default
behavior)
5) On the client, we created a double click handler for the graph so that
double-clicking a node reinvokes the service with a new root node and
redisplays the graph. It is easy to implement a go back function by
keeping track of the previous root node id's in a stack.
Hope that helps!
Rick
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
Behalf Of Amir Hossein Jadidinejad
Sent: Saturday, March 13, 2010 12:04 AM
To: Neo user discussions
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Rick,
It's really interesting. Would you please share your experiments with us?,
Some example, source code,...
Greatly appreciate your help.
Kind regards,
Amir
--- On Fri, 3/12/10, Rick Bullotta rick.bullo...@burningskysoftware.com
wrote:
From: Rick Bullotta rick.bullo...@burningskysoftware.com
Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript
To: 'Neo user discussions' user@lists.neo4j.org
Date: Friday, March 12, 2010, 6:27 PM
Amir, I'm doing something similar (also with Flexviz). I looked at a number
of other Flex graph visualization libraries (Kapit, SpringGraph, YFiles,
Raviz/Birdeye, Flare) and definitely preferred Flexviz to the others. It
seems quite extensible/customizable as well.
I'm using Flex/Flash remoting between the server and the client, and on the
server side, I'm using
[Neo] Connecting to Neo4j DB from ActionScript
Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Todd, I'm not familiar with them. Would you please provide me a simple how-to or some source code example? In fact, I'm going to visualise the Neo4j DB using FlexViz. It's really beautiful and flexible. Thanks. Amir --- On Fri, 3/12/10, Todd Stavish toddstav...@gmail.com wrote: From: Todd Stavish toddstav...@gmail.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: Neo user discussions user@lists.neo4j.org Date: Friday, March 12, 2010, 4:43 PM Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Amir, I'm doing something similar (also with Flexviz). I looked at a number of other Flex graph visualization libraries (Kapit, SpringGraph, YFiles, Raviz/Birdeye, Flare) and definitely preferred Flexviz to the others. It seems quite extensible/customizable as well. I'm using Flex/Flash remoting between the server and the client, and on the server side, I'm using WebORB Java. Rick -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Amir Hossein Jadidinejad Sent: Friday, March 12, 2010 5:10 PM To: Neo user discussions Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript Dear Todd, I'm not familiar with them. Would you please provide me a simple how-to or some source code example? In fact, I'm going to visualise the Neo4j DB using FlexViz. It's really beautiful and flexible. Thanks. Amir --- On Fri, 3/12/10, Todd Stavish toddstav...@gmail.com wrote: From: Todd Stavish toddstav...@gmail.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: Neo user discussions user@lists.neo4j.org Date: Friday, March 12, 2010, 4:43 PM Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Rick, It's really interesting. Would you please share your experiments with us?, Some example, source code,... Greatly appreciate your help. Kind regards, Amir --- On Fri, 3/12/10, Rick Bullotta rick.bullo...@burningskysoftware.com wrote: From: Rick Bullotta rick.bullo...@burningskysoftware.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: 'Neo user discussions' user@lists.neo4j.org Date: Friday, March 12, 2010, 6:27 PM Amir, I'm doing something similar (also with Flexviz). I looked at a number of other Flex graph visualization libraries (Kapit, SpringGraph, YFiles, Raviz/Birdeye, Flare) and definitely preferred Flexviz to the others. It seems quite extensible/customizable as well. I'm using Flex/Flash remoting between the server and the client, and on the server side, I'm using WebORB Java. Rick -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Amir Hossein Jadidinejad Sent: Friday, March 12, 2010 5:10 PM To: Neo user discussions Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript Dear Todd, I'm not familiar with them. Would you please provide me a simple how-to or some source code example? In fact, I'm going to visualise the Neo4j DB using FlexViz. It's really beautiful and flexible. Thanks. Amir --- On Fri, 3/12/10, Todd Stavish toddstav...@gmail.com wrote: From: Todd Stavish toddstav...@gmail.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: Neo user discussions user@lists.neo4j.org Date: Friday, March 12, 2010, 4:43 PM Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
