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-<head>
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-<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
-<title>Compatibility report</title>
-<link rel="stylesheet" type="text/css" media="screen" href="css/site.css" />
-</head>
-<body>
- <script>
-prefix='';
-</script>
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- <script src="templates/right.js"></script>
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-<div id="content">
-
-
- <h1>Compatibility report</h1>
-
- <p>Given the very large user base of SLF4J, we take backward
- compatibility very seriously. As such, changes that may cause
- incompatibility problems are listed in this page. Moreover, since
- slf4j-api.jar is the main entry point into SLF4J, that is the module
- that will be covered in most detail.
- </p>
-
- <p>Please note that in many cases incompatibility problems are
- caused by mixing different versions of slf4j artifacts. For example,
- if you are using slf4j-api-1.5.4.jar you should also use
- slf4j-simple-1.5.4.jar, using slf4j-simple-1.4.2.jar will not
- work. The same goes for all other SLF4J artifacts.
- </p>
-
- <p>The list is computed using <a
- href="http://clirr.sourceforge.net/">clirr</a>. If you have reasons
- to suspect incompatible changes not mentioned here, please kindly
- contact the slf4j developers list.</p>
-
- <h2><a href="#1_5_7" name="1_5_6">Version 1.5.7 compared to 1.5.6</a></h2>
-
- <p>No breaking changes to report.</p>
-
- <h2><a href="#1_5_6" name="1_5_5">Version 1.5.6 compared to 1.5.5</a></h2>
-
-
- <table class="bodyTable">
- <tr>
- <th>Severity</th>
- <th>Description</th>
- <th>Class</th>
- <th>Method / Field</th>
- </tr>
- <tr>
- <td>Error</td>
- <td>The&nbsp;number&nbsp;of&nbsp;parameters&nbsp;of SubstituteLoggerFactory
- constructor has changed</td>
- <td>org.slf4j.helpers.SubstituteLoggerFactory</td>
- <td>public SubstituteLoggerFactory(java.util.List)</td>
- </tr>
- </table>
-
- <p>&nbsp;</p>
-
- <p>The <code>SubstituteLoggerFactory</code> class is used internally
- by the LoggerFactory class. Changes to the constructor of
- SubstituteLoggerFactory should have strictly no effect on users.
- </p>
-
- <h2><a href="#1_5_5" name="1_5_4">Version 1.5.5 compared to 1.5.4</a></h2>
-
- <p>No breaking changes to report.</p>
-
- <h2><a href="#1_5_4" name="1_5_4">Version 1.5.4 compared to 1.5.3</a></h2>
-
- <h3>slf4j-api module, list of breaking changes:</h3>
-
-
- <table class="bodyTable">
- <tr>
- <th>Severity</th>
- <th>Description</th>
- <th>Class</th>
- <th>Method / Field</th>
- </tr>
- <tr>
- <td>Error</td>
- <td>Method 'hasReferences()' has been added to an interface</td>
- <td>org.slf4j.Marker</td>
- <td>public boolean hasReferences()</td>
- </tr>
- <tr class="alt">
- <td>Info</td>
- <td>Method 'hasChildren()' was deprecated</td>
- <td>org.slf4j.Marker</td>
- <td>public boolean hasChildren()</td>
- </tr>
-
- </table>
-
- <p>&nbsp;</p>
-
- <p>The <code>hasChildren()</code> and other documentation in the
- Marker interface was misleading users to think in terms of parent
- child relationship for markers. However, as <a
- href="http://bugzilla.slf4j.org/show_bug.cgi?id=100">bug 100</a>
- illustrates, associating markers as parents and children is not very
- helpful. It is much better to think of markers in terms of abstract
- graphs. As such, we now say that a marker contains (zero or more)
- <code>references</code> to other markers.
- </p>
-
- <p>This breaking change is justified because it corrects a
- conceptual error in the design. Previously, it was all too easy for
- developers to get confused and incorrectly link markers
- together.</p>
-
- <h2><a href="#1_5_3" name="1_5_3">Version 1.5.3 compared to 1.5.2</a></h2>
-
- <h3>slf4j-api module, list of breaking changes:</h3>
-
-
- <table class="bodyTable">
- <tr>
- <th>Severity</th>
- <th>Description</th>
- <th>Class</th>
- <th>Method / Field</th>
- </tr>
- <tr >
- <td>Error</td>
- <td>Added final modifier to class</td>
- <td>org.slf4j.helpers.MessageFormatter</td>
- <td></td>
- </tr>
- </table>
-
- <p>Declaring <code>MessageFormatter</code> class as final should not
- affect users, unless they extend this class. However, since this
- class is intended to be used internally, very few users should be
- affected.
- </p>
-
- <h2><a href="#1_5_2" name="1_5_2">Version 1.5.2 compared to 1.5.1</a></h2>
-
- <p>No breaking changes to report.</p>
-
- <h2><a href="#1_5_1" name="1_5_1">Version 1.5.1 compared to 1.5.0</a></h2>
-
-
- <h3>slf4j-api module, list of breaking changes:</h3>
-
-
- <table class="bodyTable">
- <tr>
- <th>Severity</th>
- <th>Description</th>
- <th>Class</th>
- <th>Method / Field</th>
- </tr>
- <tr >
- <td>Error</td>
- <td>Method 'getCopyOfContextMap()' has been added to an
- interface
- </td>
- <td>org.slf4j.spi.MDCAdapter</td>
- <td>public java.util.Map getCopyOfContextMap()</td>
- </tr>
- <tr class="alt">
- <td>Error</td>
- <td>Method 'setContextMap(Map)' has been added to an
- interface
- </td>
- <td>org.slf4j.spi.MDCAdapter</td>
- <td>public void setContextMap(java.util.Map)</td>
- </tr>
-
- <tr>
- <td>Error</td>
- <td>Method 'getDetachedMarker(String)' has been added to an
- interface
- </td>
- <td>org.slf4j.IMarkerFactory</td>
- <td>public org.slf4j.Marker getDetachedMarker(java.lang.String)</td>
- </tr>
-
- <tr class="alt">
- <td>Info</td>
- <td>Method 'equals(Object)' has been added to an
- interface
- </td>
- <td>org.slf4j.Marker</td>
- <td>public boolean equals(java.lang.Object)</td>
- </tr>
-
- <tr>
- <td>info</td>
- <td>Method 'hashCode()' has been added to an
- interface
- </td>
- <td>org.slf4j.Marker</td>
- <td>public int hashCode()</td>
- </tr>
-
- </table>
-
- <p>The addition of the <code>getCopyOfContextMap()</code> method in
- the <code>MDCAdapter</code> class should only impact users who have
- their own implementation of the said interface. Except for bindings
- that ship with SLF4J and for logback-classic, which will be
- naturally upgraded, there are no known other implementations of
- <code>MDCAdapter</code>. In a rare but still possible scenario, if
- the user mixes different versions for slf4j-api.jar, say version
- 1.5.1. and an SLF4J binding, say slf4j-log4j12.jar version 1.5.0,
- then a <code>java.lang.AbstractMethodError</code> will be thrown,
- but only if the client code calls the newly added method. <span
- style="color:green"> In short, although generally speaking the
- addition of a method to an interface is a breaking change, we are
- confident that no users will be impacted in this particular
- case.</span>
- </p>
-
- <p>Similar reasoning applies to the <code>setContextMap(Map)</code>
- method.</p>
-
- <p>The addition of <code>getDetachedMarker(String)</code> method in
- the <code>org.slf4j.IMarkerFactory</code> should not impact users as
- the only (known) implementation of this interface ships with SLF4J
- itself.
- </p>
-
- <p>The <code>equals()</code> and <code>hashCode()</code> methods
- were added to the <code>org.slf4j.Marker</code> interface for
- documentation purposes. Given that all objects implicitly implement
- these methods, their addition should theoretically not break
- existing code. </p>
-
-
- <h3>Other modules</h3>
-
- <p>No breaking changes to report.</p>
-
-
- <!-- ========================================= -->
- <h2><a href="#1_5_0" name="1_5_0">Version 1.5.0 compared to
- 1.4.3</a></h2>
-
- <p>No breaking changes to report.</p>
-
- <!-- ========================================= -->
- <h2><a href="#1_4_3" name="1_4_3">Version 1.4.3 compared to
- 1.4.2</a></h2>
- <p>No breaking changes to report.</p>
-
- <!-- ========================================= -->
- <h2><a href="#1_4_2" name="1_4_2">Version 1.4.2 compared to 1.4.1</a></h2>
- <p>No breaking changes to report.</p>
-
- <!-- ========================================= -->
- <h2><a href="#1_4_1" name="1_4_1">Version 1.4.1 compared to
- 1.4.0</a></h2>
- <p>No breaking changes to report.</p>
-
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