2 * Copyright 2001-2007 Internet2
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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8 * http://www.apache.org/licenses/LICENSE-2.0
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10 * Unless required by applicable law or agreed to in writing, software
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 * See the License for the specific language governing permissions and
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14 * limitations under the License.
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18 * RemotedSessionCache.cpp
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20 * SessionCache implementation that delegates to a remoted version.
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23 #include "internal.h"
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24 #include "Application.h"
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25 #include "exceptions.h"
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26 #include "ServiceProvider.h"
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27 #include "SessionCache.h"
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28 #include "attribute/Attribute.h"
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29 #include "remoting/ListenerService.h"
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30 #include "util/SPConstants.h"
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34 #include <xmltooling/XMLToolingConfig.h>
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35 #include <xmltooling/util/DateTime.h>
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36 #include <xmltooling/util/NDC.h>
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37 #include <xmltooling/util/XMLHelper.h>
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39 using namespace shibsp;
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40 using namespace xmltooling;
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41 using namespace std;
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46 class RemotedSession : public virtual Session
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49 RemotedSession(RemotedCache* cache, DDF& obj) : m_version(obj["version"].integer()), m_obj(obj),
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50 m_expires(0), m_lastAccess(time(NULL)), m_cache(cache), m_lock(NULL) {
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51 auto_ptr_XMLCh exp(m_obj["expires"].string());
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53 DateTime iso(exp.get());
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54 iso.parseDateTime();
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55 m_expires = iso.getEpoch();
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58 m_lock = Mutex::create();
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64 for_each(m_attributes.begin(), m_attributes.end(), cleanup_pair<string,Attribute>());
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75 const char* getID() const {
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76 return m_obj.name();
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78 const char* getApplicationID() const {
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79 return m_obj["application_id"].string();
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81 const char* getClientAddress() const {
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82 return m_obj["client_addr"].string();
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84 const char* getEntityID() const {
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85 return m_obj["entity_id"].string();
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87 const char* getProtocol() const {
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88 return m_obj["protocol"].string();
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90 const char* getAuthnInstant() const {
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91 return m_obj["authn_instant"].string();
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93 const char* getSessionIndex() const {
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94 return m_obj["session_index"].string();
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96 const char* getAuthnContextClassRef() const {
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97 return m_obj["authncontext_class"].string();
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99 const char* getAuthnContextDeclRef() const {
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100 return m_obj["authncontext_decl"].string();
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102 const multimap<string,Attribute*>& getAttributes() const {
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103 if (m_attributes.empty())
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104 unmarshallAttributes();
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105 return m_attributes;
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107 const vector<const char*>& getAssertionIDs() const {
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108 if (m_ids.empty()) {
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109 DDF ids = m_obj["assertions"];
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110 DDF id = ids.first();
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111 while (id.isstring()) {
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112 m_ids.push_back(id.string());
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119 time_t expires() const { return m_expires; }
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120 time_t lastAccess() const { return m_lastAccess; }
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121 void validate(const Application& application, const char* client_addr, time_t* timeout);
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124 void unmarshallAttributes() const;
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128 mutable multimap<string,Attribute*> m_attributes;
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129 mutable vector<const char*> m_ids;
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130 time_t m_expires,m_lastAccess;
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131 RemotedCache* m_cache;
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135 class RemotedCache : public SessionCache
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138 RemotedCache(const DOMElement* e);
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141 Session* find(const char* key, const Application& application, const char* client_addr=NULL, time_t* timeout=NULL);
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142 void remove(const char* key, const Application& application);
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148 const DOMElement* m_root; // Only valid during initialization
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150 map<string,RemotedSession*> m_hashtable;
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152 void dormant(const char* key);
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153 static void* cleanup_fn(void*);
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155 CondWait* shutdown_wait;
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156 Thread* cleanup_thread;
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159 SessionCache* SHIBSP_DLLLOCAL RemotedCacheFactory(const DOMElement* const & e)
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161 return new RemotedCache(e);
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165 void RemotedSession::unmarshallAttributes() const
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167 Attribute* attribute;
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168 DDF attrs = m_obj["attributes"];
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169 DDF attr = attrs.first();
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170 while (!attr.isnull()) {
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172 attribute = Attribute::unmarshall(attr);
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173 m_attributes.insert(make_pair(attribute->getId(),attribute));
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174 if (m_cache->m_log.isDebugEnabled())
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175 m_cache->m_log.debug("unmarshalled attribute (ID: %s) with %d value%s",
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176 attribute->getId(), attr.first().integer(), attr.first().integer()!=1 ? "s" : "");
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178 catch (AttributeException& ex) {
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179 const char* id = attr.first().name();
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180 m_cache->m_log.error("error unmarshalling attribute (ID: %s): %s", id ? id : "none", ex.what());
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182 attr = attrs.next();
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186 void RemotedSession::validate(const Application& application, const char* client_addr, time_t* timeout)
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188 // Basic expiration?
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189 time_t now = time(NULL);
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190 if (now > m_expires) {
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191 m_cache->m_log.info("session expired (ID: %s)", getID());
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192 throw opensaml::RetryableProfileException("Your session has expired, and you must re-authenticate.");
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197 if (m_cache->m_log.isDebugEnabled())
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198 m_cache->m_log.debug("comparing client address %s against %s", client_addr, getClientAddress());
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199 if (strcmp(getClientAddress(),client_addr)) {
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200 m_cache->m_log.warn("client address mismatch");
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201 throw opensaml::RetryableProfileException(
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202 "Your IP address ($1) does not match the address recorded at the time the session was established.",
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203 params(1,client_addr)
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211 DDF in("touch::"REMOTED_SESSION_CACHE"::SessionCache"), out;
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212 DDFJanitor jin(in);
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214 in.addmember("key").string(getID());
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215 in.addmember("version").integer(m_obj["version"].integer());
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217 // On 64-bit Windows, time_t doesn't fit in a long, so I'm using ISO timestamps.
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218 #ifndef HAVE_GMTIME_R
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219 struct tm* ptime=gmtime(timeout);
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222 struct tm* ptime=gmtime_r(timeout,&res);
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225 strftime(timebuf,32,"%Y-%m-%dT%H:%M:%SZ",ptime);
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226 in.addmember("timeout").string(timebuf);
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230 out=application.getServiceProvider().getListenerService()->send(in);
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237 if (out.isstruct()) {
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238 // We got an updated record back.
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240 for_each(m_attributes.begin(), m_attributes.end(), cleanup_const_pair<string,Attribute>());
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241 m_attributes.clear();
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246 m_lastAccess = now;
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249 RemotedCache::RemotedCache(const DOMElement* e)
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250 : SessionCache(e), m_log(Category::getInstance(SHIBSP_LOGCAT".SessionCache")), m_root(e), m_lock(NULL), shutdown(false)
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252 if (!SPConfig::getConfig().getServiceProvider()->getListenerService())
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253 throw ConfigurationException("RemotedCacheService requires a ListenerService, but none available.");
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255 m_lock = RWLock::create();
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256 shutdown_wait = CondWait::create();
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257 cleanup_thread = Thread::create(&cleanup_fn, (void*)this);
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260 RemotedCache::~RemotedCache()
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262 // Shut down the cleanup thread and let it know...
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264 shutdown_wait->signal();
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265 cleanup_thread->join(NULL);
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267 for_each(m_hashtable.begin(),m_hashtable.end(),xmltooling::cleanup_pair<string,RemotedSession>());
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269 delete shutdown_wait;
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272 Session* RemotedCache::find(const char* key, const Application& application, const char* client_addr, time_t* timeout)
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275 xmltooling::NDC ndc("find");
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278 RemotedSession* session=NULL;
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279 m_log.debug("searching local cache for session (%s)", key);
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281 map<string,RemotedSession*>::const_iterator i=m_hashtable.find(key);
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282 if (i==m_hashtable.end()) {
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284 m_log.debug("session not found locally, searching remote cache");
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286 DDF in("find::"REMOTED_SESSION_CACHE"::SessionCache"), out;
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287 DDFJanitor jin(in);
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289 in.addmember("key").string(key);
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290 in.addmember("application_id").string(application.getId());
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291 if (timeout && *timeout) {
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292 // On 64-bit Windows, time_t doesn't fit in a long, so I'm using ISO timestamps.
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293 #ifndef HAVE_GMTIME_R
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294 struct tm* ptime=gmtime(timeout);
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297 struct tm* ptime=gmtime_r(timeout,&res);
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300 strftime(timebuf,32,"%Y-%m-%dT%H:%M:%SZ",ptime);
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301 in.addmember("timeout").string(timebuf);
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305 out=application.getServiceProvider().getListenerService()->send(in);
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306 if (!out.isstruct()) {
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308 m_log.debug("session not found in remote cache");
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312 // Wrap the results in a local entry and save it.
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313 session = new RemotedSession(this, out);
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314 // The remote end has handled timeout issues, we handle address and expiration checks.
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322 // Lock for writing and repeat the search to avoid duplication.
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324 SharedLock shared(m_lock, false);
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325 if (m_hashtable.count(key)) {
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326 // We're using an existing session entry.
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328 session = m_hashtable[key];
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332 m_hashtable[key]=session;
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337 // Save off and lock the session.
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338 session = i->second;
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342 m_log.debug("session found locally, validating it for use");
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345 if (!XMLString::equals(session->getApplicationID(), application.getId())) {
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346 m_log.error("an application (%s) tried to access another application's session", application.getId());
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351 // Verify currency and update the timestamp if indicated by caller.
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353 session->validate(application, client_addr, timeout);
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357 remove(key, application);
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364 void RemotedCache::remove(const char* key, const Application& application)
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366 // Take care of local copy.
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370 DDF in("remove::"REMOTED_SESSION_CACHE"::SessionCache");
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371 DDFJanitor jin(in);
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373 in.addmember("key").string(key);
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374 in.addmember("application_id").string(application.getId());
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376 DDF out = application.getServiceProvider().getListenerService()->send(in);
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380 void RemotedCache::dormant(const char* key)
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383 xmltooling::NDC ndc("dormant");
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386 m_log.debug("deleting local copy of session (%s)", key);
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388 // lock the cache for writing, which means we know nobody is sitting in find()
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391 // grab the entry from the table
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392 map<string,RemotedSession*>::const_iterator i=m_hashtable.find(key);
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393 if (i==m_hashtable.end()) {
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398 // ok, remove the entry and lock it
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399 RemotedSession* entry=i->second;
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400 m_hashtable.erase(key);
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403 // unlock the cache
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406 // we can release the cache entry lock because we know we're not in the cache anymore
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412 void RemotedCache::cleanup()
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415 xmltooling::NDC ndc("cleanup");
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418 Mutex* mutex = Mutex::create();
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420 // Load our configuration details...
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421 static const XMLCh cleanupInterval[] = UNICODE_LITERAL_15(c,l,e,a,n,u,p,I,n,t,e,r,v,a,l);
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422 const XMLCh* tag=m_root ? m_root->getAttributeNS(NULL,cleanupInterval) : NULL;
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423 int rerun_timer = 900;
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425 rerun_timer = XMLString::parseInt(tag);
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426 if (rerun_timer <= 0)
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431 m_log.info("cleanup thread started...run every %d secs; timeout after %d secs", rerun_timer, m_cacheTimeout);
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433 while (!shutdown) {
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434 shutdown_wait->timedwait(mutex,rerun_timer);
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438 // Ok, let's run through the cleanup process and clean out
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439 // really old sessions. This is a two-pass process. The
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440 // first pass is done holding a read-lock while we iterate over
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441 // the cache. The second pass doesn't need a lock because
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442 // the 'deletes' will lock the cache.
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444 // Pass 1: iterate over the map and find all entries that have not been
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446 vector<string> stale_keys;
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447 time_t stale = time(NULL) - m_cacheTimeout;
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450 for (map<string,RemotedSession*>::const_iterator i=m_hashtable.begin(); i!=m_hashtable.end(); ++i) {
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451 // If the last access was BEFORE the stale timeout...
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453 time_t last=i->second->lastAccess();
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454 i->second->unlock();
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456 stale_keys.push_back(i->first);
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460 if (!stale_keys.empty()) {
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461 m_log.info("purging %d old sessions", stale_keys.size());
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463 // Pass 2: walk through the list of stale entries and remove them from the cache
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464 for (vector<string>::const_iterator j = stale_keys.begin(); j != stale_keys.end(); ++j)
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465 dormant(j->c_str());
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469 m_log.info("cleanup thread exiting");
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473 Thread::exit(NULL);
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476 void* RemotedCache::cleanup_fn(void* cache_p)
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478 RemotedCache* cache = reinterpret_cast<RemotedCache*>(cache_p);
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481 // First, let's block all signals
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482 Thread::mask_all_signals();
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485 // Now run the cleanup process.
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