Formatting got lost in the transition.
// Interface that must be implemented when creating a dispatch helper
callback extension
interface DispatchHelperCallback {
public Object dispatch(DataChannel channel, ClientMessage message);
}
class DispatchHelper {
private static ConcurrentHashMap<Class, DispatchHelperCallback>
registeredCallbacks = new ConcurrentHashMap<Class, Class>();
// Register user defined dispatch helper extensions
static void registerDispatchHelperCallback(Class messageClass,
DispatchHelperCallback callback) {
DispatchHelper.registeredCallbacks.put(messageClass, callback);
}
static Object dispatch(DataChannel channel, ClientMessage message) {
// do most common messages first...
if (message instanceof QueryMessage) {
return channel.onQuery(null,
((QueryMessage)message).getQuery());
}
else if (message instanceof SyncMessage) {
SyncMessage sync = (SyncMessage) message;
return channel.onSync(null, sync.getSenderChanges(),
sync.getType());
}
else if (message instanceof BootstrapMessage) {
return
channel.getEntityResolver().getClientEntityResolver();
}
// check to see if we have a callback for this message and fire
it if we do.
else if
(DispatchHelper.registeredCallbacks.containsKey(message.getClass()) {
return
DispatchHelper.registeredCallbacks.get(message.getClass()).dispatch(chan
nel, message);
}
else {
throw new CayenneRuntimeException("Message dispatch error.
Unsupported message: " + message);
}
}
}
Zissis Trabaris * Chief Technology Officer * INSYSWARE * 3235 West River
Road, Grand Island, New York, 14072, USA
Mobile (716) 930-5654 * Office (518) 636-4118 * Fax (716) 625-1305 *
z.trabari..nsysware.com * www.insysware.com
CONFIDENTIALITY: This email (including any attachments) may contain
confidential, proprietary and privileged information, and unauthorized
disclosure or use is prohibited. If you received this email in error,
please notify the sender and delete this email from your system. Thank
you.
-----Original Message-----
From: Zissis Trabaris [mailto:z.trabari..nsysware.com]
Sent: Friday, June 05, 2009 9:00 AM
To: de..ayenne.apache.org
Subject: RE: Initial ROP client query takes way to long
It's too bad we can't extend DispatchHelper. If we could I could define
a new message called BootstrapZiped and send the client entity resolver
in a compressed format over the wire and then sub class ClientChannel to
send a BootstrapZiped message within getEntityResolver. It should not be
difficult to extend DispatchHelper so that we can register our own
callbacks and client messages. I wrote a quick and dirty simple example
below if you want to use it:
// Interface that must be implemented when creating a dispatch helper
callback extension
interface DispatchHelperCallback {
public Object dispatch(DataChannel channel, ClientMessage message);
}
class DispatchHelper {
private static ConcurrentHashMap<Class, DispatchHelperCallback>
registeredCallbacks = new ConcurrentHashMap<Class, Class>();
// Register user defined dispatch helper extensions
static void registerDispatchHelperCallback(Class messageClass,
DispatchHelperCallback callback) {
DispatchHelper.registeredCallbacks.put(messageClass, callback);
}
static Object dispatch(DataChannel channel, ClientMessage message) {
// do most common messages first...
if (message instanceof QueryMessage) {
return channel.onQuery(null, ((QueryMessage)
message).getQuery());
}
else if (message instanceof SyncMessage) {
SyncMessage sync = (SyncMessage) message;
return channel.onSync(null, sync.getSenderChanges(),
sync.getType());
}
else if (message instanceof BootstrapMessage) {
return
channel.getEntityResolver().getClientEntityResolver();
}
// check to see if we have a callback for this message and fire
it if we do.
else
if(DispatchHelper.registeredCallbacks.containsKey(message.getClass()) {
return
DispatchHelper.registeredCallbacks.get(message.getClass()).dispatch(chan
nel, message);
}
else {
throw new CayenneRuntimeException(
"Message dispatch error. Unsupported message: " +
message);
}
}
}
Zissis Trabaris * Chief Technology Officer * INSYSWARE * 3235 West River
Road, Grand Island, New York, 14072, USA
Mobile (716) 930-5654 * Office (518) 636-4118 * Fax (716) 625-1305 *
z.trabari..nsysware.com * www.insysware.com
CONFIDENTIALITY: This email (including any attachments) may contain
confidential, proprietary and privileged information, and unauthorized
disclosure or use is prohibited. If you received this email in error,
please notify the sender and delete this email from your system. Thank
you.
-----Original Message-----
From: Andrus Adamchik [mailto:andru..bjectstyle.org]
Sent: Friday, June 05, 2009 7:49 AM
To: de..ayenne.apache.org
Subject: Re: Initial ROP client query takes way to long
Correct - the first ROP access causes client to load all the mapping
metadata from the server. I guess the sheer # of tables in your schema
causes such a delay. To avoid slow bootstrap theoretically it should
be possible to persist the mapping on the client with some coding
effort, however this ability does not exist in Cayenne as of now.
Another thing is to make sure that the server is "warmed up" when the
first client connects, as the server overhead of loading mapping for
121000 entities and then converting them to client counterparts may be
noticeable. So maybe call something like this on server startup:
getDomain().getEntityResolver().getClientEntityResolver()
Andrus
On Jun 5, 2009, at 12:35 PM, Zissis Trabaris wrote:
> Here is the scenario ... We have a database with over 121,000 tables
> mapped in cayenne running under an out of the box ROP client server
> model. After the client creates the connection, it authenticates the
> user by querying the user table (that table only currently has about 6
> rows in it). The initial query always takes about 30 seconds and then
> everything is fine on subsequent queries. I am wondering if
> something is
> going on with the first ROP client query. Is the client trying to
> cache
> the server's entity resolver data set?? Or is it something else? Is
> there any way to speed up the initial client query?
>
>
>
> Zissis Trabaris * Chief Technology Officer * INSYSWARE * 3235 West
> River
> Road, Grand Island, New York, 14072, USA
> Mobile (716) 930-5654 * Office (518) 636-4118 * Fax (716) 625-1305 *
> z.trabari..nsysware.com <mailto:%20%20z.trabaris@insysware.com> *
> www.insysware.com <http://www.insysware.com/>
>
> ________________________________
>
> CONFIDENTIALITY: This email (including any attachments) may contain
> confidential, proprietary and privileged information, and unauthorized
> disclosure or use is prohibited. If you received this email in error,
> please notify the sender and delete this email from your system. Thank
> you.
>
>
>
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