[SF 2632636] FileChannel Purge Unit Tests Broken

Foundation/include/Poco/FileChannel.h

@@ -154,6 +154,7 @@ class Foundation_API FileChannel: public Channel
 	///
 	/// The purgeAge property can have the following values:
 	///
+	///   * "none" or ""   no purging
 	///   * <n> [seconds]  the maximum age is <n> seconds.
 	///   * <n> minutes:   the maximum age is <n> minutes.
 	///   * <n> hours:     the maximum age is <n> hours.
@@ -161,10 +162,10 @@ class Foundation_API FileChannel: public Channel
 	///   * <n> weeks:     the maximum age is <n> weeks.
 	///   * <n> months:    the maximum age is <n> months, where a month has 30 days.
 	///
-	/// The purgeCount property has an integer value that
-	/// specifies the maximum number of archived log files.
-	/// If the number is exceeded, archived log files are 
-	/// deleted, starting with the oldest.
+	/// The purgeCount property has an integer value that specifies the maximum number 
+	/// of archived log files. If the number is exceeded, archived log files are 
+	/// deleted, starting with the oldest. When "none" or empty string are
+	/// supplied, they reset purgeCount to none (no purging).
 	///
 	/// For a more lightweight file channel class, see SimpleFileChannel.
 {

Foundation/src/FileChannel.cpp

@@ -302,8 +302,14 @@ void FileChannel::setCompress(const std::string& compress)
 
 void FileChannel::setPurgeAge(const std::string& age)
 {
+	delete _pPurgeStrategy;
+	_pPurgeStrategy = 0;
+	_purgeAge = "none";
+	if (age.empty() || 0 == icompare(age, "none")) return;
+
 	std::string::const_iterator it  = age.begin();
 	std::string::const_iterator end = age.end();
+	
 	int n = 0;
 	while (it != end && std::isspace(*it)) ++it;
 	while (it != end && std::isdigit(*it)) { n *= 10; n += *it++ - '0'; }
@@ -324,8 +330,10 @@ void FileChannel::setPurgeAge(const std::string& age)
 		factor = 30*Timespan::DAYS;
 	else if (unit != "seconds")
 		throw InvalidArgumentException("purgeAge", age);
-		
-	delete _pPurgeStrategy;
+
+	if (0 == n)
+		throw InvalidArgumentException("Zero is not valid purge age.");
+
 	_pPurgeStrategy = new PurgeByAgeStrategy(Timespan(factor*n));
 	_purgeAge = age;
 }
@@ -333,14 +341,22 @@ void FileChannel::setPurgeAge(const std::string& age)
 
 void FileChannel::setPurgeCount(const std::string& count)
 {
+	delete _pPurgeStrategy;
+	_pPurgeStrategy = 0;
+	_purgeAge = "none";
+	if (count.empty() || 0 == icompare(count, "none")) return;
+
+	int n = 0;
 	std::string::const_iterator it  = count.begin();
 	std::string::const_iterator end = count.end();
-	int n = 0;
+	
 	while (it != end && std::isspace(*it)) ++it;
 	while (it != end && std::isdigit(*it)) { n *= 10; n += *it++ - '0'; }
 	while (it != end && std::isspace(*it)) ++it;
 
-	delete _pPurgeStrategy;
+	if (0 == n)
+		throw InvalidArgumentException("Zero is not valid purge count.");
+
 	_pPurgeStrategy = new PurgeByCountStrategy(n);
 	_purgeCount = count;
 }

Foundation/testsuite/src/FileChannelTest.cpp

@@ -47,6 +47,7 @@
 #include "Poco/DateTimeFormat.h"
 #include "Poco/NumberFormatter.h"
 #include "Poco/DirectoryIterator.h"
+#include "Poco/Exception.h"
 #include <vector>
 
 
@@ -64,6 +65,7 @@ using Poco::LocalDateTime;
 using Poco::DateTimeFormatter;
 using Poco::DateTimeFormat;
 using Poco::DirectoryIterator;
+using Poco::InvalidArgumentException;
 
 
 FileChannelTest::FileChannelTest(const std::string& name): CppUnit::TestCase(name)
@@ -405,6 +407,7 @@ void FileChannelTest::purgeAge(const std::string& pa)
 void FileChannelTest::noPurgeAge(const std::string& npa)
 {
 	std::string name = filename();
+
 	try
 	{
 		AutoPtr<FileChannel> pChannel = new FileChannel(name);
@@ -444,8 +447,16 @@ void FileChannelTest::noPurgeAge(const std::string& npa)
 void FileChannelTest::testPurgeAge()
 {
 	purgeAge("5 seconds");
-	noPurgeAge("0 seconds");
+	try
+	{
+		noPurgeAge("0 seconds");
+		fail ("must fail");
+	} catch (InvalidArgumentException&)
+	{
+	}
+
 	noPurgeAge("");
+	noPurgeAge("none");
 }
 
 
@@ -516,8 +527,16 @@ void FileChannelTest::noPurgeCount(const std::string& npc)
 void FileChannelTest::testPurgeCount()
 {
 	purgeCount("2");
+	try
+	{
+		noPurgeCount("0");
+		fail ("must fail");
+	} catch (InvalidArgumentException&)
+	{
+	}
+
 	noPurgeCount("");
-	noPurgeCount("0");
+	noPurgeCount("none");
 }