Matthias Brantner has proposed merging 
lp:~zorba-coders/zorba/feature-sleep_module into lp:zorba.

Commit message:
initial version of sleep module

Requested reviews:
  Matthias Brantner (matthias-brantner)

For more details, see:
https://code.launchpad.net/~zorba-coders/zorba/feature-sleep_module/+merge/216475

initial version of sleep module
-- 
https://code.launchpad.net/~zorba-coders/zorba/feature-sleep_module/+merge/216475
Your team Zorba Coders is subscribed to branch lp:zorba.
=== modified file 'modules/CMakeLists.txt'
--- modules/CMakeLists.txt	2014-01-03 17:31:44 +0000
+++ modules/CMakeLists.txt	2014-04-18 18:30:22 +0000
@@ -27,6 +27,7 @@
 ADD_SUBDIRECTORY(schema)
 ADD_SUBDIRECTORY(sctx)
 ADD_SUBDIRECTORY(sequence)
+ADD_SUBDIRECTORY(sleep)
 ADD_SUBDIRECTORY(store)
 ADD_SUBDIRECTORY(structured-items)
 ADD_SUBDIRECTORY(uri)

=== added directory 'modules/sleep'
=== added file 'modules/sleep/CMakeLists.txt'
--- modules/sleep/CMakeLists.txt	1970-01-01 00:00:00 +0000
+++ modules/sleep/CMakeLists.txt	2014-04-18 18:30:22 +0000
@@ -0,0 +1,21 @@
+# Copyright 2006-2014 The FLWOR Foundation.
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# 
+# http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+DECLARE_ZORBA_MODULE(
+  FILE sleep.xq
+  URI "http://zorba.io/modules/sleep";
+  VERSION 1.0
+)
+
+# vim:set et sw=2 ts=2:

=== added file 'modules/sleep/sleep.xq'
--- modules/sleep/sleep.xq	1970-01-01 00:00:00 +0000
+++ modules/sleep/sleep.xq	2014-04-18 18:30:22 +0000
@@ -0,0 +1,41 @@
+xquery version "3.0";
+
+(:
+ : Copyright 2006-2013 The FLWOR Foundation.
+ :
+ : Licensed under the Apache License, Version 2.0 (the "License");
+ : you may not use this file except in compliance with the License.
+ : You may obtain a copy of the License at
+ :
+ : http://www.apache.org/licenses/LICENSE-2.0
+ :
+ : Unless required by applicable law or agreed to in writing, software
+ : distributed under the License is distributed on an "AS IS" BASIS,
+ : WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ : See the License for the specific language governing permissions and
+ : limitations under the License.
+:)
+
+(:~
+ : This module provides a function to put the currently running query
+ : to sleep.
+ :
+ :)
+module namespace sleep = "http://zorba.io/modules/sleep";;
+
+declare namespace an = "http://zorba.io/annotations";;
+
+declare namespace ver = "http://zorba.io/options/versioning";;
+declare option ver:module-version "1.0";
+
+(:~ 
+ : Puts the currently running query to sleep.
+ : This function is mainly useful in development e.g. to simulate the
+ : effects of long-running tasks wrt. the concurrent execution of
+ : requests.
+ :
+ : @param $millis the number of milliseconds to sleep
+ : @return the function is sequential and returns the empty sequence
+ :)
+declare %an:sequential function sleep:millis($millis as xs:integer)
+  as empty-sequence() external;

=== added directory 'modules/sleep/sleep.xq.src'
=== added file 'modules/sleep/sleep.xq.src/sleep.cpp'
--- modules/sleep/sleep.xq.src/sleep.cpp	1970-01-01 00:00:00 +0000
+++ modules/sleep/sleep.xq.src/sleep.cpp	2014-04-18 18:30:22 +0000
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2006-2014 The FLWOR Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "sleep.h"
+
+#ifdef WIN32
+# include <windows.h>
+#else
+# include <time.h>
+#endif
+#include <stdlib.h>
+#include <limits>
+#include <zorba/item_factory.h>
+#include <zorba/empty_sequence.h>
+#include <zorba/user_exception.h>
+
+namespace zorba { namespace sleep {
+
+MillisFunction::~MillisFunction()
+{}
+
+zorba::ItemSequence_t
+MillisFunction::evaluate(
+  const Arguments_t& aArgs,
+  const zorba::StaticContext*,
+  const zorba::DynamicContext*) const
+{
+  // getIntegerValue is not available in Zorba
+  // => get the string, parse it, and check the limits
+  Item lRequestItem;
+  Iterator_t arg0_iter = aArgs[0]->getIterator();
+  arg0_iter->open();
+  arg0_iter->next(lRequestItem);
+  arg0_iter->close();
+
+  std::stringstream lStream;
+  unsigned int lMillis;
+
+  zorba::String lStringValue = lRequestItem.getStringValue();
+  
+  bool lSuccess = lStream << lStringValue &&
+    lStream >> lMillis &&
+    lStream.eof();
+
+  if ( !lSuccess )
+  {
+    zorba::String lLocalName = "InvalidValue";
+    ItemFactory* lFactory = Zorba::getInstance(0)->getItemFactory();
+    zorba::Item lQName = lFactory->createQName( getURI(), "", lLocalName);
+
+    std::ostringstream lMsg;
+    lMsg << lStringValue.c_str() << ": exceeds limit ("
+      << std::numeric_limits<unsigned int>::min()
+      << " < x < "
+      << std::numeric_limits<unsigned int>::max() << ")";
+
+    throw USER_EXCEPTION(lQName, lMsg.str());
+  }
+
+#ifdef WIN32
+  Sleep(lMillis);
+#else
+  const int32_t lFactor = 1000000;
+  struct timespec lTs;
+  lTs.tv_sec = lMillis / 1000;
+  lTs.tv_nsec = (lMillis % 1000) * lFactor;
+  nanosleep(&lTs, 0);
+#endif
+
+  return zorba::ItemSequence_t(new zorba::EmptySequence());
+}
+
+zorba::ExternalFunction*
+SleepModule::getExternalFunction(const zorba::String& aLocalname)
+{
+  FuncMap_t::const_iterator lFind = theFunctions.find(aLocalname);
+  zorba::ExternalFunction*& lFunc = theFunctions[aLocalname];
+  if (lFind == theFunctions.end()) {
+    if (aLocalname.find("millis") != zorba::String::npos) {
+      lFunc = new MillisFunction(this);
+    }
+  }
+  return lFunc;
+}
+
+SleepModule::~SleepModule()
+{
+  for (FuncMap_t::const_iterator lIter = theFunctions.begin();
+      lIter != theFunctions.end(); ++lIter)
+  {
+    delete lIter->second;
+  }
+  theFunctions.clear();
+}
+
+void
+SleepModule::destroy()
+{
+  if (!dynamic_cast<SleepModule*>(this))
+    return;
+  delete this;
+}
+
+} /* namespace sleep */ } /* namespace zorba */

=== added file 'modules/sleep/sleep.xq.src/sleep.h'
--- modules/sleep/sleep.xq.src/sleep.h	1970-01-01 00:00:00 +0000
+++ modules/sleep/sleep.xq.src/sleep.h	2014-04-18 18:30:22 +0000
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2006-2014 The FLWOR Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef ZORBA_MODULES_SLEEP_H
+#define ZORBA_MODULES_SLEEP_H
+
+#include <zorba/zorba.h>
+#include <zorba/external_module.h>
+#include <zorba/function.h>
+
+namespace zorba { namespace sleep {
+
+class SleepModule : public ExternalModule
+{
+public:
+  virtual ~SleepModule();
+
+  virtual void destroy();
+
+  virtual zorba::String
+  getURI() const { return "http://zorba.io/modules/sleep";; }
+
+  virtual zorba::ExternalFunction*
+  getExternalFunction(const zorba::String& aLocalname);
+
+protected:
+  struct ltstr
+  {
+    bool operator()(const String& s1, const String& s2) const
+    {
+      return s1.compare(s2) < 0;
+    }
+  };
+
+  typedef std::map<String, ExternalFunction*, ltstr> FuncMap_t;
+
+  FuncMap_t theFunctions;
+};
+
+
+class MillisFunction : public ContextualExternalFunction
+{
+public:
+  MillisFunction(const SleepModule* aModule)
+    : theModule(aModule)
+  {}
+
+  virtual ~MillisFunction();
+
+  virtual zorba::String
+  getLocalName() const { return "millis"; }
+
+  virtual zorba::String
+  getURI() const { return theModule->getURI(); }
+
+  virtual zorba::ItemSequence_t
+  evaluate(const Arguments_t&,
+           const zorba::StaticContext*,
+           const zorba::DynamicContext*) const;
+
+protected:
+  const SleepModule* theModule;
+};
+
+} /* namespace sleep */ } /* namespace zorba */
+
+#ifdef WIN32
+#  define DLL_EXPORT __declspec(dllexport)
+#else
+#  define DLL_EXPORT __attribute__ ((visibility("default")))
+#endif
+extern "C" DLL_EXPORT zorba::ExternalModule* createModule() {
+  return new zorba::sleep::SleepModule();
+}
+
+#endif

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