Apache Qpid: Open Source AMQP Messaging

A RHEL4 Grimoire

by Michael Goulish on this 11th day of April, 2008

Introduction

Programmer! Turn back now, if you can, to the daylit world!

But if you must walk this road - take with you this map! Do not stray into the mires and pits where I have wandered and despaired.

Herein I will describe what I can of the perils I have encountered in the antique land of RHEL4.

Iterators and the "->" operator.

I believe this is a compiler problem with the -> operator, in the neighborhood of any kind of iterators.

Code like this will not compile:

ConsumerImplMap::iterator i = consumers.find(delivery.getTag());

if (i != consumers.end())
{  get_pointer(i)->acknowledged(delivery); // <--- Bad!  }

Do this instead:

ConsumerImplMap::iterator i = consumers.find(delivery.getTag());

if (i != consumers.end())
{  (*i).second->complete(delivery); // <--- Good!  }

( Thanks, Kim! )

Don't use BOOST_FIXTURE_TEST_CASE

Because it Doesn't Exist.

All it does is allow you to use a class (or struct) declaration in many test cases without declaring it in every one.

So what? Big deal! Just declare your structure in each test case, and use the QPID_AUTO_TEST_CASE macro instead!

If you have this struct:

struct ClientSessionFixture : public Foo
{  int bar;  }

Don't do this:

BOOST_FIXTURE_TEST_CASE(testQueueQuery, ClientSessionFixture)
{  bar = 666;  BOOST_CHECK_EQUAL ( bar, 666 );  }

Do do this:

QPID_AUTO_TEST_CASE(testQueueQuery)
{  ClientSessionFixture fix;  fix.bar = 666;  BOOST_CHECK_EQUAL ( fix.bar, 666 );  }

(Thanks, Alan!)

Don't use the BOOST_TEST macros !

If you are tempted to use

BOOST_AUTO_TEST_SUITE, or

BOOST_AUTO_TEST_CASE, or

BOOST_AUTO_TEST_SUITE_END,

dont!

Use instead:

QPID_AUTO_TEST_SUITE, or

QPID_AUTO_TEST_CASE, or

QPID_AUTO_TEST_SUITE_END !

They turn into Appropriate Things depending on the version of Boost you are using.

Sometimes the Appropriate Thing is whitespace...

(Thanks, Alan and Kim !)

Don't use boost::iostreams.

They don't exist.

/usr/include/boost/iostreams/: No such file or directory

Instead, use low-level Unix IO, from the Dawn of Time.

open()

read()

write()

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