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// **********************************************************************
//
// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceInternal;
public final class ProxyFactory
{
public Ice.ObjectPrx
stringToProxy(String str)
{
Reference ref = _instance.referenceFactory().create(str);
return referenceToProxy(ref);
}
public String
proxyToString(Ice.ObjectPrx proxy)
{
if(proxy != null)
{
Ice.ObjectPrxHelperBase h = (Ice.ObjectPrxHelperBase)proxy;
return h.__reference().toString();
}
else
{
return "";
}
}
public Ice.ObjectPrx
propertyToProxy(String prefix)
{
Reference ref = _instance.referenceFactory().createFromProperties(prefix);
return referenceToProxy(ref);
}
public Ice.ObjectPrx
streamToProxy(BasicStream s)
{
Ice.Identity ident = new Ice.Identity();
ident.__read(s);
Reference ref = _instance.referenceFactory().create(ident, s);
return referenceToProxy(ref);
}
public Ice.ObjectPrx
referenceToProxy(Reference ref)
{
if(ref != null)
{
Ice.ObjectPrxHelperBase proxy = new Ice.ObjectPrxHelperBase();
proxy.setup(ref);
return proxy;
}
else
{
return null;
}
}
public void
proxyToStream(Ice.ObjectPrx proxy, BasicStream s)
{
if(proxy != null)
{
Ice.ObjectPrxHelperBase h = (Ice.ObjectPrxHelperBase)proxy;
Reference ref = h.__reference();
ref.getIdentity().__write(s);
ref.streamWrite(s);
}
else
{
Ice.Identity ident = new Ice.Identity();
ident.name = "";
ident.category = "";
ident.__write(s);
}
}
public int
checkRetryAfterException(Ice.LocalException ex, Reference ref, int cnt)
{
TraceLevels traceLevels = _instance.traceLevels();
Ice.Logger logger = _instance.initializationData().logger;
if(ex instanceof Ice.ObjectNotExistException)
{
Ice.ObjectNotExistException one = (Ice.ObjectNotExistException)ex;
LocatorInfo li = ref.getLocatorInfo();
if(li != null)
{
//
// We retry ObjectNotExistException if the reference is
// indirect.
//
li.clearObjectCache((IceInternal.IndirectReference)ref);
}
else if(ref.getRouterInfo() != null && one.operation.equals("ice_add_proxy"))
{
//
// If we have a router, an ObjectNotExistException with an
// operation name "ice_add_proxy" indicates to the client
// that the router isn't aware of the proxy (for example,
// because it was evicted by the router). In this case, we
// must *always* retry, so that the missing proxy is added
// to the router.
//
if(traceLevels.retry >= 1)
{
String s = "retrying operation call to add proxy to router\n" + ex.toString();
logger.trace(traceLevels.retryCat, s);
}
return cnt; // We must always retry, so we don't look at the retry count.
}
else
{
//
// For all other cases, we don't retry ObjectNotExistException.
//
throw ex;
}
}
else if(ex instanceof Ice.RequestFailedException)
{
//
// For all other cases, we don't retry ObjectNotExistException
//
throw ex;
}
//
// There is no point in retrying an operation that resulted in a
// MarshalException. This must have been raised locally (because
// if it happened in a server it would result in an
// UnknownLocalException instead), which means there was a problem
// in this process that will not change if we try again.
//
// The most likely cause for a MarshalException is exceeding the
// maximum message size, which is represented by the the subclass
// MemoryLimitException. For example, a client can attempt to send
// a message that exceeds the maximum memory size, or accumulate
// enough batch requests without flushing that the maximum size is
// reached.
//
// This latter case is especially problematic, because if we were
// to retry a batch request after a MarshalException, we would in
// fact silently discard the accumulated requests and allow new
// batch requests to accumulate. If the subsequent batched
// requests do not exceed the maximum message size, it appears to
// the client that all of the batched requests were accepted, when
// in reality only the last few are actually sent.
//
if(ex instanceof Ice.MarshalException)
{
throw ex;
}
++cnt;
assert(cnt > 0);
if(cnt > _retryIntervals.length)
{
if(traceLevels.retry >= 1)
{
String s = "cannot retry operation call because retry limit has been exceeded\n" + ex.toString();
logger.trace(traceLevels.retryCat, s);
}
throw ex;
}
int interval = _retryIntervals[cnt - 1];
if(traceLevels.retry >= 1)
{
String s = "retrying operation call";
if(interval > 0)
{
s += " in " + interval + "ms";
}
s += " because of exception\n" + ex;
logger.trace(traceLevels.retryCat, s);
}
if(cnt > 0)
{
//
// Sleep before retrying.
//
try
{
Thread.currentThread().sleep(interval);
}
catch(InterruptedException ex1)
{
}
}
return cnt;
}
//
// Only for use by Instance.
//
ProxyFactory(Instance instance)
{
_instance = instance;
String str = _instance.initializationData().properties.getPropertyWithDefault("Ice.RetryIntervals", "0");
String[] arr = str.trim().split("[ \t\n\r]+");
if(arr.length > 0)
{
_retryIntervals = new int[arr.length];
for(int i = 0; i < arr.length; i++)
{
int v;
try
{
v = Integer.parseInt(arr[i]);
}
catch(NumberFormatException ex)
{
v = 0;
}
//
// If -1 is the first value, no retry and wait intervals.
//
if(i == 0 && v == -1)
{
_retryIntervals = new int[0];
break;
}
_retryIntervals[i] = v > 0 ? v : 0;
}
}
else
{
_retryIntervals = new int[1];
_retryIntervals[0] = 0;
}
}
private Instance _instance;
private int[] _retryIntervals;
}
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