static TransportAddressFactory() {
_string_to_type = new Hashtable();
_ta_cache = new Cache(CACHE_SIZE);
}
public TimeOutManager() {
/*
* Here we set the timeout mechanisms. There is a default
* value, but this is now dynamic based on the observed
* RTT of the network
*/
//resend the request after 5 seconds by default
_min_timeout = 5000;
_global_stats = new TimeStats(_min_timeout, 0.98);
//Start with 50 sec timeout
_acked_rtt_stats = new TimeStats(_min_timeout * 10, 0.98);
_last_check = DateTime.UtcNow;
_send_stats = new Cache(1000);
_type_stats = new Cache(100);
_sync = new object();
}
public ReqrepManager(string info, PType prefix) {
lock( _inst_tab_sync ) {
_instance_table.Replace(info, this);
}
_info = info;
_prefix = prefix;
#if BRUNET_SIMULATOR
Random r = Node.SimulatorRandom;
#else
Random r = new Random();
#endif
//Don't use negative numbers:
_req_state_table = new UidGenerator<RequestState>(r, true);
//Don't use negative numbers:
_reply_id_table = new UidGenerator<ReplyState>(r, true);
/**
* We keep a list of the most recent 1000 replies until they
* get too old. If the reply gets older than reptimeout, we
* remove it
*/
_reply_cache = new Cache(1000);
_reply_cache.EvictionEvent += HandleReplyCacheEviction;
_to_mgr = new TimeOutManager();
}
public ReflectionRpcHandler(RpcManager rpc, object handler, bool use_sender) {
_rpc = rpc;
_handler = handler;
_type = _handler.GetType();
_use_sender = use_sender;
_sync = new object();
//Cache the 10 most used methods:
_method_cache = new Cache(10);
}
public RpcManager(ReqrepManager rrm) {
_sync = new Object();
_rrman = rrm;
_method_cache = new Cache(CACHE_SIZE);
_method_handlers = new Hashtable();
}
public ReqrepManager(string info, PType prefix) {
lock( _inst_tab_sync ) {
_instance_table.Replace(info, this);
}
_info = info;
_prefix = prefix;
_req_handler_table = new Hashtable();
Random r = new Random();
//Don't use negative numbers:
_req_state_table = new UidGenerator<RequestState>(r, true);
//Don't use negative numbers:
_reply_id_table = new UidGenerator<ReplyState>(r, true);
_rep_handler_table = new Hashtable();
/**
* We keep a list of the most recent 1000 replies until they
* get too old. If the reply gets older than reptimeout, we
* remove it
*/
_reply_cache = new Cache(1000);
_reply_cache.EvictionEvent += HandleReplyCacheEviction;
/*
* Here we set the timeout mechanisms. There is a default
* value, but this is now dynamic based on the observed
* RTT of the network
*/
//resend the request after 5 seconds.
_edge_reqtimeout = new TimeSpan(0,0,0,0,5000);
_nonedge_reqtimeout = new TimeSpan(0,0,0,0,5000);
//Start with 50 sec timeout
_acked_reqtimeout = new TimeSpan(0,0,0,0,50000);
//Here we track the statistics to improve the timeouts:
_nonedge_rtt_stats = new TimeStats(_nonedge_reqtimeout.TotalMilliseconds, 0.98);
_edge_rtt_stats = new TimeStats(_edge_reqtimeout.TotalMilliseconds, 0.98);
_acked_rtt_stats = new TimeStats(_acked_reqtimeout.TotalMilliseconds, 0.98);
_last_check = DateTime.UtcNow;
}
/**
* Protected constructor, we want to control ReqrepManager instances
* running on a node.
* @param info some context that we work for
*/
public ReqrepManager(object info) {
ReqrepManager existing;
lock( _inst_tab_sync ) {
if(_instance_table.TryGetValue(info, out existing) ) {
throw new Exception("Already an existing ReqrepManager for: " + info.ToString());
}
else {
_instance_table[info] = this;
}
}
_info = info.ToString();
Random r = new Random();
//Don't use negative numbers:
_req_state_table = new UidGenerator<RequestState>(r, true);
//Don't use negative numbers:
_reply_id_table = new UidGenerator<ReplyState>(r, true);
/**
* We keep a list of the most recent 1000 replies until they
* get too old. If the reply gets older than reptimeout, we
* remove it
*/
_reply_cache = new Cache(1000);
_reply_cache.EvictionEvent += HandleReplyCacheEviction;
_to_mgr = new TimeOutManager();
}
public void TestEnumeration() {
const int MAX_SIZE = 100;
Random r = new Random();
Cache c = new Cache(MAX_SIZE);
Hashtable ht = new Hashtable();
for(int i = 0; i < MAX_SIZE; i++) {
int k = r.Next();
int v = r.Next();
ht[k] = v;
c[k] = v;
}
int enum_count = 0;
foreach(DictionaryEntry de in c) {
Assert.IsNotNull( c[de.Key], "Enumeration");
enum_count++;
}
Assert.AreEqual(enum_count, c.Count, "Enumeration count");
//Remove a bunch at random:
ArrayList removed = new ArrayList();
for(int i = 0; i < MAX_SIZE / 2; i++) {
object k = r.Next(0, MAX_SIZE);
removed.Add( k );
c.Remove( k );
}
//Make sure they are really gone:
enum_count = 0;
foreach(DictionaryEntry de in c) {
Assert.IsNotNull( c[de.Key], "Enumeration after remove");
enum_count++;
}
Assert.AreEqual(enum_count, c.Count, "Enumeration count after remove");
foreach(object k in removed) {
Assert.IsNull(c[k], "removed objects removed");
}
//Let's enumerate and removed:
foreach(DictionaryEntry de in c) {
c.Remove(de.Key);
Assert.IsNull( c[de.Key], "Removing with enumeration");
}
Assert.AreEqual(0, c.Count, "Removed everything");
}
public void TestEviction() {
const int MAX_SIZE = 1000;
Random r = new Random();
Cache c = new Cache(MAX_SIZE);
Hashtable ht = new Hashtable();
Hashtable ht_evicted = new Hashtable();
EventHandler eh = delegate(object o, EventArgs args) {
Cache.EvictionArgs a = (Cache.EvictionArgs)args;
ht_evicted[a.Key] = a.Value;
};
c.EvictionEvent += eh;
int i = 0;
for(i = 0; i < 50 * MAX_SIZE; i++) {
int v = r.Next();
ht[i] = v;
c[i] = v;
int exp_size = Math.Min(i+1, MAX_SIZE);
Assert.AreEqual(c.Count, exp_size, "Size check");
Assert.AreEqual(ht[i], c[i], "equivalence check");
//Keep the zero'th element in the cache:
object v_0 = c[0];
Assert.IsNotNull(v_0, "0th element still in the cache");
}
Assert.AreEqual(c.Count, MAX_SIZE, "Full cache");
//Now check that everything is either in the Cache or was evicted:
IDictionaryEnumerator ide = ht.GetEnumerator();
while(ide.MoveNext()) {
int key = (int)ide.Key;
int val = (int)ide.Value;
object c_val = c[key];
if( !c.Contains(key) ) {
Assert.IsNull(c_val, "Evicted entry is null");
c_val = ht_evicted[key];
Assert.AreEqual(c_val, val, "Evicted lookup");
}
else {
//Not in the cache:
Assert.AreEqual(c_val, val, "Cache lookup");
}
}
//Let's remove from the Cache and see if that worked:
int s0 = c.Count;
object rv = c.Remove(0);
Assert.AreEqual( rv, ht[0], "Removed value matches");
Assert.IsNull(c[0], "Remove really removed");
Assert.AreEqual( s0 - 1, c.Count, "Removed decreased size");
}
public void TestRecall() {
const int MAX_SIZE = 100;
Random r = new Random();
Cache c = new Cache(MAX_SIZE);
Hashtable ht = new Hashtable();
for(int i = 0; i < MAX_SIZE; i++) {
int k = r.Next();
int v = r.Next();
ht[k] = v;
c[k] = v;
}
IDictionaryEnumerator ide = ht.GetEnumerator();
while(ide.MoveNext()) {
int key = (int)ide.Key;
int val = (int)ide.Value;
object c_val = c[key];
Assert.AreEqual(c_val, val, "Test lookup");
}
}
public void TestUpdate() {
Cache c = new Cache(16);
object entry = new object();
object first = new object();
object second = new object();
c[entry] = first;
c[entry] = second;
Assert.IsTrue(c[entry].Equals(second), "Entry equals second");
}
public RpcManager(ReqrepManager rrm) {
_sync = new Object();
_rrman = rrm;
_method_cache = new Cache(CACHE_SIZE);
_method_handlers = new Hashtable();
#if DAVID_ASYNC_INVOKE
_rpc_command = new BlockingQueue();
_rpc_thread = new Thread(RpcCommandRun);
_rpc_thread.IsBackground = true;
_rpc_thread.Start();
#endif
}
static TransportAddressFactory() {
_string_to_type = new Dictionary<string,TransportAddress.TAType>();
_ta_cache = new Cache(CACHE_SIZE);
_ta_factories = new Dictionary<string,Converter<string,TransportAddress>>();
AddFactoryMethod("tcp", IPTransportAddress.Create);
AddFactoryMethod("udp", IPTransportAddress.Create);
AddFactoryMethod("function", IPTransportAddress.Create);
AddFactoryMethod("tls", IPTransportAddress.Create);
AddFactoryMethod("tlstest", IPTransportAddress.Create);
//Here's the odd ball:
AddFactoryMethod("s", delegate(string s) {
return new SimulationTransportAddress(s);
});
}
public FragmentingHandler(int max_frags_cached) : base() {
_fragments = new Cache(max_frags_cached);
_fragments.EvictionEvent += this.HandleEviction;
_frag_count = new SCG.Dictionary<Pair<uint, int>, Fragments>();
}
