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// **********************************************************************
//
// Copyright (c) 2003-2006 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.
//
// **********************************************************************
using System.Diagnostics;
namespace IceInternal
{
public sealed class ProxyFactory
{
public Ice.ObjectPrx stringToProxy(string str)
{
Reference r = instance_.referenceFactory().create(str);
return referenceToProxy(r);
}
public string proxyToString(Ice.ObjectPrx proxy)
{
if(proxy != null)
{
Ice.ObjectPrxHelperBase h = (Ice.ObjectPrxHelperBase) proxy;
return h.reference__().ToString();
}
else
{
return "";
}
}
public Ice.ObjectPrx streamToProxy(BasicStream s)
{
Ice.Identity ident = new Ice.Identity();
ident.read__(s);
Reference r = instance_.referenceFactory().create(ident, s);
return referenceToProxy(r);
}
public Ice.ObjectPrx referenceToProxy(Reference r)
{
if(r != null)
{
Ice.ObjectPrxHelperBase proxy = new Ice.ObjectPrxHelperBase();
proxy.setup(r);
return proxy;
}
else
{
return null;
}
}
public void proxyToStream(Ice.ObjectPrx proxy, BasicStream s)
{
if(proxy != null)
{
Ice.ObjectPrxHelperBase h = (Ice.ObjectPrxHelperBase)proxy;
Reference r = h.reference__();
r.getIdentity().write__(s);
r.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)
{
//
// We retry ObjectNotExistException if the reference is
// indirect. Otherwise, we don't retry other *NotExistException,
// which are all derived from RequestFailedException.
//
if(ex is Ice.ObjectNotExistException)
{
try
{
IndirectReference ir = (IndirectReference)@ref;
if(ir.getLocatorInfo() == null)
{
throw ex;
}
ir.getLocatorInfo().clearObjectCache(ir);
}
catch(System.InvalidCastException)
{
throw ex;
}
}
else if(ex is Ice.RequestFailedException)
{
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 is Ice.MarshalException)
{
throw ex;
}
++cnt;
Debug.Assert(cnt > 0);
TraceLevels traceLevels = instance_.traceLevels();
Ice.Logger logger = instance_.logger();
if(cnt > _retryIntervals.Length)
{
if(traceLevels.retry >= 1)
{
string s = "cannot retry operation call because retry limit has been exceeded\n" + ex;
logger.trace(traceLevels.retryCat, s);
}
throw ex;
}
int interval = _retryIntervals[cnt - 1];
if(traceLevels.retry >= 1)
{
string s = "re-trying operation call";
if(interval > 0)
{
s += " in " + interval + "ms";
}
s += " because of exception\n" + ex;
logger.trace(traceLevels.retryCat, s);
}
if(interval > 0)
{
//
// Sleep before retrying.
//
System.Threading.Thread.Sleep(interval);
}
return cnt;
}
//
// Only for use by Instance
//
internal ProxyFactory(Instance instance)
{
instance_ = instance;
string str = instance_.properties().getPropertyWithDefault("Ice.RetryIntervals", "0");
char[] separators = { ' ', '\t', '\n', '\r' };
string[] arr = str.Trim().Split(separators);
if(arr.Length > 0)
{
_retryIntervals = new int[arr.Length];
for (int i = 0; i < arr.Length; i++)
{
int v;
try
{
v = System.Int32.Parse(arr[i]);
}
catch(System.FormatException)
{
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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