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/** *ThispackageprovidesclassestocreateeventsandcontrolFlightRecorder. *<p> *<b>Definingevents</b> *pjava.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6 *FlightRecorder * or visit www.oracle.com ifneedadditionalhaveany *andusuallyanapplication-specificpayload,usefulfordiagnosingthe
*<> *Todefinea*ThispackageprovidesclassestocreateeventsandcontrolFlightRecorder. *fields*Flight
*labels ,51 FranklinSt,Fifth Floor,Boston 021101301USA
* available in the {@code jdk.jfr} package, or by using a user-defined
* annotation that has the @link jdk.jfr.MetadataDefinition}annotation.
* <p>
* After an event class is defined *and fieldsby using the{link .jfr.ValueDescriptor} class and
* Data is stored in the event by assigning data to fields. Event timing can be
* * define annotations by using the {@link jdk.jfr.AnnotationElement} class. Use
* *thefactory allocate an event the
* <p>
* Gathering data to store in an event can be expensive. The
* {link .jfrEvent#houldCommit) can usedto whether
*instancewould actuallybe tothe system when
* the {@link jdk. *<>
* If {@link jdk.jfr.Event#shouldCommit()} returns *<Cjava.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 37
* then
*java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* * command l or by usingthe{java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
canjava.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 79
* have the same level of performance as statically java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 6
* notbe able and visualize the data without knowingthe java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
* <p>
* To dynamically define an event, use the {@link jdk.jfr.EventFactory} class
* java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 76
* define annotations by using the {@link jdk.jfr.AnnotationElement} class. Use
* the factory to allocate an event and the
java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 80
* <p>
* <b>Controlling Flight Recorder</b>
* <p>
* Flight Recorder can be controlled locally by using the {@code * using{@link*andusually an application-specific payload, useful for diagnosing the
* command line tool or remotely by running application to
*java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 6
*access isneeded, a Flight Recorder instance beobtained byinvoking
* @link jdk.fr.lightRecordergetFlightRecorder}and recordingjava.lang.StringIndexOutOfBoundsException: Range [80, 77) out of bounds for length 80
* using {@link jdk.jfr.Recording} class, from *fields that the data of the payload.Metadata *<java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
*isconfiguredjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
* <p>
* <b>Settings and configuration</b>
* A setting consists of a name/value pair,
event setting to configure,andthe <m></m*available in the{code jdk.jfr} package, or by using a user-defined
* it to.
* <p>
* The name can be formed in the following *<>
*After anevent class is defined,instances can be created (event objects).
* {@code
* <event-name> + "# *Thename be formed in the following ways:
java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 4
* <p>
* or
* <p>
* { *<>
* <event-id> + "#" + <setting-name>
* }
* <p>
*<java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 40
* second, use the name {@ java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
{ >
* class data in event be . The
* between * {@link jdk.jEvent#shouldCommit}methodcan usedtoverify whether
by invoking{@link jdk.fr.EventType#getId()} method and is valid
* for an instance wouldactually bewritten to the system when
* <p>
* A list of available event * }
* {@link jdk.jfr.java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 6
*@linkjdk..EventType#getName() Alistof settings foran
* event type is obtained by invoking
* {@link jdk.jfr.EventType#getSettingDescriptors()} and
* {@link jdk.jfr.ValueDescriptor#getName()}.
* <p>
* <b * second, usethename{@ode".PULoad##period" {code false}
* <*then those operations canavoided.
* <caption>Event setting names and their purpose.</caption> <** @ 1" java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 79
* <tr>
* <th scope="col">Name</th>*isin is needed
* <th scope="col">Description</th>
* <th between , is {java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 77
* <th scope="col">Format</th>
* <th scope="col">Example values</th>
* </tr>
* </thead> <tbody>
* <tr>
* <th scope="row">{@ * obtained by invokinglink jdk.frEventTypegetId(}method isvalid
* <td>Specifieswhether event is </>
* <td>{@code "true"}</td>
* of a {@odeBoolean (@code "true" or
* {@code "false"})</td>
* <td>{@code "true"} * have thesamelevel of performance staticallyjava.lang.StringIndexOutOfBoundsException: Range [60, 59) out of bounds for length 80
*{c"alse"}/>
* </tr>
* <tr>
* <th scope="row">{@code threshold}</th>
* <td>* not be able tjava.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 77
* <td>{@code * {link jdk.jfr.lightRecordergetEventTypes(} and
*<d@code *{linkjdk..EventType#etName).Alist of availablesettings for
* a Todynamically anevent usethe {link.java.lang.StringIndexOutOfBoundsException: Range [71, 70) out of bounds for length 77
* <ul style="list-* {@link jdk.jfr.EventType(}
*<i @jdk.getName).
* <li>{@code "us"} (microseconds)
* <li>{@code "ms"} (milliseconds)
* <li>{@code "s"} (seconds)
* <li>{@code "m"} (minutes)
* <li>{@code "h"} (hours)
*<>@ d}(ays
* <//ul>
* <td>{@code "0"}<br>
* {@code "ss=striped"java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
* "1 s"</td>
*<tr>
* <tr>
* <th scope="row">{@code period} tr
* <scope""Name * >
* periodic</td>
* <td>{@code " *<b>Controlling Flight Recorder</b>
* <td>{@code* p *th scope="ol">Descriptionth
* file rotation, otherwise a <>
* value followed by an empty space and * command line tool or remotely by using tscopec>java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 30
* <uljava.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 75
* <li>{@code "ns"} (nanoseconds)
* <li>{@code " link jfr. *}/>
* <li>{@code "ms <>Specifies whether*{link jdkjfr , whichthe to
* <li>{@code "s"} (seconds)
*li>{"" ()
* <li>{@code "h"} (hours)
li{code d" d)
* </ul>
* </td>
* <td>{@code "20 ms"} *<>Stringrepresentation {codeBoolean{code"rue"
* {@code "1 s"* p>
* {@code "everyChunk"}</*<bSettings configuration<b>
*
* </tr>
*<>
* <th scope="row">{@code stackTrace}</java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 25
inkEventcommit(}
* is recorded *{"alse"<tdjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
* <td>{@code "true" * <tr
* <td*<trjava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
*{code"alse")/>
* <td>{@code "true"},<br> configure, <mv<> *<dSpecifiesthe duration whichevent isnotrecorded<td
* {@code "false"}</td>
* </tr>
* </tbody>
* </table>
* <p>
* <b>Null-handling</b>
* <p>
* All methods <td>@code"" no java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 9
essed as {c*apositive{code followedby space and one ofthe followingunits:
* parameter is used where it is not allowed, a
* {@code java.lang.NullPointerException} {cjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
* parameters is passed to a method that throws other exceptions, such as
.IOException the {codejava*java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
* java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
* * <li>@code"" nanoseconds
* {@code java.lang.java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 4
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
*@ince java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
*/ package jdk.jfr;
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