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| <div class="subTitle">org.apache.logging.log4j.message</div> |
| <h2 title="Interface Message" class="title">Interface Message</h2> |
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| <dt>All Superinterfaces:</dt> |
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| </dl> |
| <dl> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><a href="../../../../../org/apache/logging/log4j/message/EntryMessage.html" title="interface in org.apache.logging.log4j.message">EntryMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ExitMessage.html" title="interface in org.apache.logging.log4j.message">ExitMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/FlowMessage.html" title="interface in org.apache.logging.log4j.message">FlowMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/MessageCollectionMessage.html" title="interface in org.apache.logging.log4j.message">MessageCollectionMessage</a><T>, <a href="../../../../../org/apache/logging/log4j/message/MultiformatMessage.html" title="interface in org.apache.logging.log4j.message">MultiformatMessage</a>, <a href="../../../../../org/apache/logging/log4j/util/MultiFormatStringBuilderFormattable.html" title="interface in org.apache.logging.log4j.util">MultiFormatStringBuilderFormattable</a>, <a href="../../../../../org/apache/logging/log4j/message/ReusableMessage.html" title="interface in org.apache.logging.log4j.message">ReusableMessage</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../../org/apache/logging/log4j/message/FormattedMessage.html" title="class in org.apache.logging.log4j.message">FormattedMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/LocalizedMessage.html" title="class in org.apache.logging.log4j.message">LocalizedMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/MapMessage.html" title="class in org.apache.logging.log4j.message">MapMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/MessageFormatMessage.html" title="class in org.apache.logging.log4j.message">MessageFormatMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ObjectArrayMessage.html" title="class in org.apache.logging.log4j.message">ObjectArrayMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ObjectMessage.html" title="class in org.apache.logging.log4j.message">ObjectMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ParameterizedMessage.html" title="class in org.apache.logging.log4j.message">ParameterizedMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ReusableObjectMessage.html" title="class in org.apache.logging.log4j.message">ReusableObjectMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ReusableParameterizedMessage.html" title="class in org.apache.logging.log4j.message">ReusableParameterizedMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ReusableSimpleMessage.html" title="class in org.apache.logging.log4j.message">ReusableSimpleMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/SimpleMessage.html" title="class in org.apache.logging.log4j.message">SimpleMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/StringFormattedMessage.html" title="class in org.apache.logging.log4j.message">StringFormattedMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/StringMapMessage.html" title="class in org.apache.logging.log4j.message">StringMapMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/StructuredDataCollectionMessage.html" title="class in org.apache.logging.log4j.message">StructuredDataCollectionMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/StructuredDataMessage.html" title="class in org.apache.logging.log4j.message">StructuredDataMessage</a>, <a href="../../../../../org/apache/logging/log4j/message/ThreadDumpMessage.html" title="class in org.apache.logging.log4j.message">ThreadDumpMessage</a></dd> |
| </dl> |
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| <br> |
| <pre>public interface <a href="../../../../../src-html/org/apache/logging/log4j/message/Message.html#line.46">Message</a> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre> |
| <div class="block">An interface for various Message implementations that can be logged. Messages can act as wrappers |
| around Objects so that user can have control over converting Objects to Strings when necessary without |
| requiring complicated formatters and as a way to manipulate the message based on information available |
| at runtime such as the locale of the system. |
| <p> |
| Custom Message implementations should consider implementing the <a href="../../../../../org/apache/logging/log4j/util/StringBuilderFormattable.html" title="interface in org.apache.logging.log4j.util"><code>StringBuilderFormattable</code></a> |
| interface for more efficient processing. Garbage-free Layouts will call |
| <a href="../../../../../org/apache/logging/log4j/util/StringBuilderFormattable.html#formatTo-java.lang.StringBuilder-"><code>formatTo(StringBuilder)</code></a> instead of |
| <a href="../../../../../org/apache/logging/log4j/message/Message.html#getFormattedMessage--"><code>getFormattedMessage()</code></a> if the Message implements StringBuilderFormattable. |
| </p> |
| <p> |
| Note: Message objects should not be considered to be thread safe nor should they be assumed to be |
| safely reusable even on the same thread. The logging system may provide information to the Message |
| objects and the Messages might be queued for asynchronous delivery. Thus, any modifications to a |
| Message object by an application should by avoided after the Message has been passed as a parameter on |
| a Logger method. |
| </p></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/logging/log4j/util/StringBuilderFormattable.html" title="interface in org.apache.logging.log4j.util"><code>StringBuilderFormattable</code></a></dd> |
| </dl> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/message/Message.html#getFormat--">getFormat</a></span>()</code> |
| <div class="block">Gets the format portion of the Message.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/message/Message.html#getFormattedMessage--">getFormattedMessage</a></span>()</code> |
| <div class="block">Gets the Message formatted as a String.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/message/Message.html#getParameters--">getParameters</a></span>()</code> |
| <div class="block">Gets parameter values, if any.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/message/Message.html#getThrowable--">getThrowable</a></span>()</code> |
| <div class="block">Gets the throwable, if any.</div> |
| </td> |
| </tr> |
| </table> |
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| <h4>getFormattedMessage</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../src-html/org/apache/logging/log4j/message/Message.html#line.69">getFormattedMessage</a>()</pre> |
| <div class="block">Gets the Message formatted as a String. Each Message implementation determines the |
| appropriate way to format the data encapsulated in the Message. Messages that provide |
| more than one way of formatting the Message will implement MultiformatMessage. |
| <p> |
| When configured to log asynchronously, this method is called before the Message is queued, unless this |
| message implements <a href="../../../../../org/apache/logging/log4j/message/ReusableMessage.html" title="interface in org.apache.logging.log4j.message"><code>ReusableMessage</code></a> or is annotated with <a href="../../../../../org/apache/logging/log4j/message/AsynchronouslyFormattable.html" title="annotation in org.apache.logging.log4j.message"><code>AsynchronouslyFormattable</code></a>. |
| This gives the Message implementation class a chance to create a formatted message String with the current value |
| of any mutable objects. |
| The intention is that the Message implementation caches this formatted message and returns it on subsequent |
| calls. (See <a href="https://issues.apache.org/jira/browse/LOG4J2-763">LOG4J2-763</a>.) |
| </p> |
| <p> |
| When logging synchronously, this method will not be called for Messages that implement the |
| <a href="../../../../../org/apache/logging/log4j/util/StringBuilderFormattable.html" title="interface in org.apache.logging.log4j.util"><code>StringBuilderFormattable</code></a> interface: instead, the |
| <a href="../../../../../org/apache/logging/log4j/util/StringBuilderFormattable.html#formatTo-java.lang.StringBuilder-"><code>formatTo(StringBuilder)</code></a> method will be called so the |
| Message can format its contents without creating intermediate String objects. |
| </p></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The message String.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getFormat--"> |
| <!-- --> |
| </a> |
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| <h4>getFormat</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../src-html/org/apache/logging/log4j/message/Message.html#line.82">getFormat</a>()</pre> |
| <div class="block">Gets the format portion of the Message.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The message format. Some implementations, such as ParameterizedMessage, will use this as |
| the message "pattern". Other Messages may simply return an empty String. |
| TODO Do all messages have a format? What syntax? Using a Formatter object could be cleaner. |
| (RG) In SimpleMessage the format is identical to the formatted message. In ParameterizedMessage and |
| StructuredDataMessage it is not. It is up to the Message implementer to determine what this |
| method will return. A Formatter is inappropriate as this is very specific to the Message |
| implementation so it isn't clear to me how having a Formatter separate from the Message would be cleaner.</dd> |
| </dl> |
| </li> |
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| <h4>getParameters</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[] <a href="../../../../../src-html/org/apache/logging/log4j/message/Message.html#line.89">getParameters</a>()</pre> |
| <div class="block">Gets parameter values, if any.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An array of parameter values or null.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>getThrowable</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> <a href="../../../../../src-html/org/apache/logging/log4j/message/Message.html#line.96">getThrowable</a>()</pre> |
| <div class="block">Gets the throwable, if any.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the throwable or null.</dd> |
| </dl> |
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