Author: buildbot
Date: Sat Mar 16 19:16:25 2013
New Revision: 854766
Log:
Production update by buildbot for camel
Modified:
websites/production/camel/content/cache/main.pageCache
websites/production/camel/content/camel-30-ideas.html
Modified: websites/production/camel/content/cache/main.pageCache
==============================================================================
Binary files - no diff available.
Modified: websites/production/camel/content/camel-30-ideas.html
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--- websites/production/camel/content/camel-30-ideas.html (original)
+++ websites/production/camel/content/camel-30-ideas.html Sat Mar 16 19:16:25
2013
@@ -92,7 +92,7 @@
<table class="sectionMacro" border="0" cellpadding="5" cellspacing="0"
width="100%"><tbody><tr><td colspan="1" rowspan="1" valign="top"
class="confluenceTd" width="20%">
<div class="panel" style="border-width: 1px;"><div class="panelContent">
<div>
-<ul><li><a shape="rect" href="#Camel3.0-Ideas-Camel3.0Ideas">Camel 3.0
Ideas</a></li><ul><li><a shape="rect"
href="#Camel3.0-Ideas-Tableofcontents">Table of contents</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-JDKsupport">JDK support</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-JDK8JavaDSL">JDK8 Java DSL</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-ClearerArchitectureofCamelCore">Clearer
Architecture of Camel Core</a></li><ul><li><a shape="rect"
href="#Camel3.0-Ideas-Splitcamelcoreintomultipleparts%28hadrian%29">Split
camel-core into multiple parts (hadrian)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Avoidshadinggoogleconcurrentlinkedmapincamelcore">Avoid
shading google concurrent linked map in camel-core</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Definescopeandrulesforcamelcorepackages%28champion%3F%29">Define
scope and rules for camel-core packages ( <em>champion</em>?)</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-Moreflexibleroutesatrunt
ime%28claus%29">More flexible routes at runtime (claus)</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-Fixrouteswithmultipleinputs%28claus%29">Fix
routes with multiple inputs (claus)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-RouteinitializationlogicforJavaDSLandXMLDSLs%28claus%29">Route
initialization logic for Java DSL and XML DSLs (claus)</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-AddOnException%2CInterceptor%2Cetc.toJAXBmodelforaCamelContextDefinition%28claus%29">Add
OnException, Interceptor, etc. to JAXB model for a CamelContextDefinition
(claus)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Tightenuproutedefinitions%28claus%29">Tighten up route
definitions (claus)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-MessageHistoryEIP%2FMessageStore%28ChristianOhr%29">Message
History EIP/Message Store (Christian Ohr)</a></li></ul><li><a shape="rect"
href="#Camel3.0-Ideas-DependencyUpgrades">Dependency Upgrades</a></li><li><a
shape="rect" href="#Camel3.
0-Ideas-JMXnaming">JMX naming</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Removenotusedcomponents">Remove not used
components</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-SplitcamelcxfintoWSandREST">Split camel-cxf into WS and
REST</a></li><li><a shape="rect" href="#Camel3.0-Ideas-Oldideas">Old
ideas</a></li><ul><li><a shape="rect"
href="#Camel3.0-Ideas-Supportforasynchronoustransactions">Support for
asynchronous transactions</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Streamcaching">Stream caching</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-EIP">EIP</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-ScheduleinDSL">Schedule in DSL</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-AdvancedScalasupport">Advanced Scala
support</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-MoreEIPsas@annotations">More EIPs as
@annotations</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Unifiedstatistics">Unified statistics</a></li><li><a
shape="rect" href="#Camel3.0-I
deas-SEDA%2FVMcomponentstoleverageasyncroutingengine">SEDA/VM components to
leverage async routing engine</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-camelosgitest">camel-osgi-test</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-REST">REST</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Moreloadtests%28cmueller%29">More load tests
(cmueller)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-OSGienhancements">OSGi enhancements</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-Easiercommit%2Frollbackforcomponentdevelopers">Easier
commit/rollback for component developers</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-RefactorUnitOfWork">Refactor UnitOfWork</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-ImprovementstoThreadPoolProfileforthreadmanagement">Improvements
to ThreadPoolProfile for thread management</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-TightenuponException">Tighten up
onException</a></li><li><a shape="rect" href="#Camel3.0-Ideas-Addcomposit
eEIPtocomposeanumberofEIPsintoasingleEIP">Add composite EIP to compose a
number of EIPs into a single EIP</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-RemoveSpringtransactiondependencyfromJMScomponent%28RemovedbecauseSJMSwillbenonspringversion%29">
</a><del>Remove Spring transaction dependency from JMS component</del>
(Removed because SJMS will be non-spring version)</li></ul></ul></ul></div>
+<ul><li><a shape="rect" href="#Camel3.0-Ideas-Camel3.0Ideas">Camel 3.0
Ideas</a></li><ul><li><a shape="rect"
href="#Camel3.0-Ideas-Tableofcontents">Table of contents</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-JDKsupport">JDK support</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-JDK8JavaDSL">JDK8 Java DSL</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-RoutingCoreReengineering%28raulk%29">Routing
Core Re-engineering (raulk)</a></li><ul><li><a shape="rect"
href="#Camel3.0-Ideas-ConvertingsomeEIPsfrom%22performers%22tomere%22deciders%22">Converting
some EIPs from "performers" to mere "deciders"</a></li></ul><li><a
shape="rect" href="#Camel3.0-Ideas-ClearerArchitectureofCamelCore">Clearer
Architecture of Camel Core</a></li><ul><li><a shape="rect"
href="#Camel3.0-Ideas-Splitcamelcoreintomultipleparts%28hadrian%29">Split
camel-core into multiple parts (hadrian)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Avoidshadinggoogleconcurrentlinkedmapincamelcore">Avoid sh
ading google concurrent linked map in camel-core</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Definescopeandrulesforcamelcorepackages%28champion%3F%29">Define
scope and rules for camel-core packages ( <em>champion</em>?)</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-Moreflexibleroutesatruntime%28claus%29">More
flexible routes at runtime (claus)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Fixrouteswithmultipleinputs%28claus%29">Fix routes with
multiple inputs (claus)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-RouteinitializationlogicforJavaDSLandXMLDSLs%28claus%29">Route
initialization logic for Java DSL and XML DSLs (claus)</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-AddOnException%2CInterceptor%2Cetc.toJAXBmodelforaCamelContextDefinition%28claus%29">Add
OnException, Interceptor, etc. to JAXB model for a CamelContextDefinition
(claus)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Tightenuproutedefinitions%28claus%29">Tighten up route
definitio
ns (claus)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-MessageHistoryEIP%2FMessageStore%28ChristianOhr%29">Message
History EIP/Message Store (Christian Ohr)</a></li></ul><li><a shape="rect"
href="#Camel3.0-Ideas-DependencyUpgrades">Dependency Upgrades</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-JMXnaming">JMX naming</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-Removenotusedcomponents">Remove not used
components</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-SplitcamelcxfintoWSandREST">Split camel-cxf into WS and
REST</a></li><li><a shape="rect" href="#Camel3.0-Ideas-Oldideas">Old
ideas</a></li><ul><li><a shape="rect"
href="#Camel3.0-Ideas-Supportforasynchronoustransactions">Support for
asynchronous transactions</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Streamcaching">Stream caching</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-EIP">EIP</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-ScheduleinDSL">Schedule in DSL</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-AdvancedScalasupport">Advanced Scala
support</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-MoreEIPsas@annotations">More EIPs as
@annotations</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Unifiedstatistics">Unified statistics</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-SEDA%2FVMcomponentstoleverageasyncroutingengine">SEDA/VM
components to leverage async routing engine</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-camelosgitest">camel-osgi-test</a></li><li><a
shape="rect" href="#Camel3.0-Ideas-REST">REST</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-Moreloadtests%28cmueller%29">More load tests
(cmueller)</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-OSGienhancements">OSGi enhancements</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-Easiercommit%2Frollbackforcomponentdevelopers">Easier
commit/rollback for component developers</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-RefactorUnitOfWork">Refactor UnitOfWork</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-ImprovementstoThreadPoolProfileforthreadmanagement">Improvements
to ThreadPoolProfile for thread management</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-TightenuponException">Tighten up
onException</a></li><li><a shape="rect"
href="#Camel3.0-Ideas-AddcompositeEIPtocomposeanumberofEIPsintoasingleEIP">Add
composite EIP to compose a number of EIPs into a single EIP</a></li><li><a
shape="rect"
href="#Camel3.0-Ideas-RemoveSpringtransactiondependencyfromJMScomponent%28RemovedbecauseSJMSwillbenonspringversion%29">
</a><del>Remove Spring transaction dependency from JMS component</del>
(Removed because SJMS will be non-spring version)</li></ul><li><a shape="rect"
href="#Camel3.0-Ideas-DefaulttouseTransactedmodebydefault">Default to use
Transacted mode by default</a></li></ul></ul></div>
</div></div></td></tr></tbody></table>
<h3><a shape="rect" name="Camel3.0-Ideas-JDKsupport"></a>JDK support</h3>
@@ -111,6 +111,25 @@ We should aim to be compatible with JDK8
Though this may comes later in Camel 3.x when JDK8 is GA.<br clear="none">
At least stuff like Predicate, Expression, AggregationStrategy etc. are
"functional interfaces" (containing only one method) and Java 8 applications
can implement them using lambdas. That's only a start, but it doesn't require a
specific DSL.</p>
+<h3><a shape="rect"
name="Camel3.0-Ideas-RoutingCoreReengineering%28raulk%29"></a>Routing Core
Re-engineering (raulk)</h3>
+
+<p>The routing core of Camel 2.x is heavily based on a recursive call pattern,
where Processors are responsible for calling the next one along the chain. This
results in lengthy and meaningless stacktraces (difficult to make sense out of
and debug for newcomers) and higher memory usage due to retention of local
variables for a longer time than strictly needed. </p>
+
+<p>Moreover, Camel weaves a large number of "plumbing" processors along the
way which should not really be processors because they form part of the very
essence of the routing core, e.g. error handlers, stream caching interceptors,
trace interceptors, async processor helpers, MDC, etc.</p>
+
+<p>The proposal is to shift towards an iterative model, by redesigning the
logic of Camel routing. The suggested model is defined by these pillars:</p>
+
+<ul class="alternate" type="square"><li>A single class, or a limited set of
them, contain the routing logic of Camel. Package name:
<tt>org.apache.camel.core.routing</tt>. Central (abstract) class:
<tt>RoutingCore</tt>. Concrete realisations could be: PipeliningRoutingCore,
MulticastRoutingCore, depending on the fundamental routing pattern.</li><li>The
RoutingCore iteratively calls the routing steps, one after another. The routing
steps return their result to the <tt>RoutingCore</tt>, who is in charge of
calling the next element subsequently. OUT and IN are bridged if necessary
(PipeliningRoutingCore).</li><li>The Processor interface is crumbled up into
its many specialisations, each of which represents a distinct concept of the
Camel framework: RoutingDecider (EIPs should only take decisions about the
routing, but <b>not</b> perform the routing itself, e.g. choice, filter, loop,
throttle, etc.; see examples in subsection below.), Actions, ErrorHandler
(already exists), Inte
rceptor, etc.</li><li>The RoutingCore is responsible of all the "magic" now
disseminated across a number of processors. Assisted by Helper
classes.</li></ul>
+
+
+<p>The goal of this idea isn't to zap off recursion altogether, just to
consolidate the routing logic into a handful of cornerstone classes.</p>
+
+<p>Camel is no longer a baby and the framework concepts are well mature, thus
they should be transferred to the API and avoid making everything a raw
Processor.</p>
+
+<h4><a shape="rect"
name="Camel3.0-Ideas-ConvertingsomeEIPsfrom%22performers%22tomere%22deciders%22"></a>Converting
some EIPs from "performers" to mere "deciders"</h4>
+
+<ul class="alternate" type="square"><li>choice() => evaluates the
predicates and returns the List of Processors or Endpoints to
invoke.</li><li>filter() => same as choice(), but returning null if the
filter doesn't match, to continue to the next routing step.</li><li>loop()
=> evaluates whether the looping control predicate still stands. If yes, it
returns the processors to invoke, where the last is itself (to trigger the
looping logic again); else, it returns null to continue to the next routing
step.</li><li>throttle() => pauses accordingly and then returns the
endpoint/processors to invoke.</li><li>...</li></ul>
+
<h3><a shape="rect"
name="Camel3.0-Ideas-ClearerArchitectureofCamelCore"></a>Clearer Architecture
of Camel Core</h3>
@@ -338,7 +357,17 @@ It may make more sense to move onRedeliv
<p><del>(+1: cgeer)</del></p>
-<p><del>Refactor the JMS component to remove the dependency on Spring
PlatformTransactionManager and replace with JTA
TransactionManager.</del></p></div>
+<p><del>Refactor the JMS component to remove the dependency on Spring
PlatformTransactionManager and replace with JTA TransactionManager.</del></p>
+
+<h3><a shape="rect"
name="Camel3.0-Ideas-DefaulttouseTransactedmodebydefault"></a>Default to use
Transacted mode by default </h3>
+
+<p>One thing I regret about the design of Camel was defaulting to
non-transacted mode by default and forcing users to explicitly enable
transactional model with a Transaction Manager.</p>
+
+<p>It might be nice in Camel 3 to assume everything is transacted by default;
and mimmick a form of transaction manager for non-transactional resource.</p>
+
+<p>e.g. its pretty common to work with messaging like JMS and databases as a
common set of endpoints; the easiest thing that could possibly work for end
users is for those to just be transacted by default without the user having to
grok how to tinker with component configurations & Transaction Manager
registration.</p>
+
+<p>Note I'm not advocating XA here; I think the default for camel should be
for Idempotent Consumer and simple approach to middleware</p></div>
</td>
<td valign="top">
<div class="navigation">
