/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only , as published by the Free Software Foundation .
* However , the following notice accompanied the original version of this
* file :
*
* Written by Doug Lea and Martin Buchholz with assistance from
* members of JCP JSR - 166 Expert Group and released to the public
* domain , as explained at
* http : //creativecommons.org/publicdomain/zero/1.0/
*/
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicIntegerArray;
import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicLongArray;
import java.util.concurrent.atomic.AtomicLongFieldUpdater;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.atomic.AtomicReferenceArray;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests of atomic class methods accepting lambdas introduced in JDK8 .
*/
public class Atomic8Test extends JSR166TestCase {
public static void main(String[] args) {
main(suite(), args);
}
public static Test suite() {
return new TestSuite(Atomic8Test.class );
}
static long addLong17(long x) { return x + 17 ; }
static int addInt17(int x) { return x + 17 ; }
static Item addItem17(Item x) {
return new Item(x.intValue() + 17 );
}
static Item sumItem(Item x, Item y) {
return new Item(x.intValue() + y.intValue());
}
volatile long aLongField;
volatile int anIntField;
volatile Item anItemField;
AtomicLongFieldUpdater<Atomic8Test> aLongFieldUpdater() {
return AtomicLongFieldUpdater.newUpdater
(Atomic8Test.class , "aLongField" );
}
AtomicIntegerFieldUpdater<Atomic8Test> anIntFieldUpdater() {
return AtomicIntegerFieldUpdater.newUpdater
(Atomic8Test.class , "anIntField" );
}
AtomicReferenceFieldUpdater<Atomic8Test,Item> anItemFieldUpdater() {
return AtomicReferenceFieldUpdater.newUpdater
(Atomic8Test.class , Item.class , "anItemField" );
}
/**
* AtomicLong getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testLongGetAndUpdate() {
AtomicLong a = new AtomicLong(1 L);
mustEqual(1 L, a.getAndUpdate(Atomic8Test::addLong17));
mustEqual(18 L, a.getAndUpdate(Atomic8Test::addLong17));
mustEqual(35 L, a.get());
}
/**
* AtomicLong updateAndGet updates with supplied function and
* returns result .
*/
public void testLongUpdateAndGet() {
AtomicLong a = new AtomicLong(1 L);
mustEqual(18 L, a.updateAndGet(Atomic8Test::addLong17));
mustEqual(35 L, a.updateAndGet(Atomic8Test::addLong17));
}
/**
* AtomicLong getAndAccumulate returns previous value and updates
* with supplied function .
*/
public void testLongGetAndAccumulate() {
AtomicLong a = new AtomicLong(1 L);
mustEqual(1 L, a.getAndAccumulate(2 L, Long ::sum));
mustEqual(3 L, a.getAndAccumulate(3 L, Long ::sum));
mustEqual(6 L, a.get());
}
/**
* AtomicLong accumulateAndGet updates with supplied function and
* returns result .
*/
public void testLongAccumulateAndGet() {
AtomicLong a = new AtomicLong(1 L);
mustEqual(7 L, a.accumulateAndGet(6 L, Long ::sum));
mustEqual(10 L, a.accumulateAndGet(3 L, Long ::sum));
mustEqual(10 L, a.get());
}
/**
* AtomicInteger getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testIntGetAndUpdate() {
AtomicInteger a = new AtomicInteger(1 );
mustEqual(1 , a.getAndUpdate(Atomic8Test::addInt17));
mustEqual(18 , a.getAndUpdate(Atomic8Test::addInt17));
mustEqual(35 , a.get());
}
/**
* AtomicInteger updateAndGet updates with supplied function and
* returns result .
*/
public void testIntUpdateAndGet() {
AtomicInteger a = new AtomicInteger(1 );
mustEqual(18 , a.updateAndGet(Atomic8Test::addInt17));
mustEqual(35 , a.updateAndGet(Atomic8Test::addInt17));
mustEqual(35 , a.get());
}
/**
* AtomicInteger getAndAccumulate returns previous value and updates
* with supplied function .
*/
public void testIntGetAndAccumulate() {
AtomicInteger a = new AtomicInteger(1 );
mustEqual(1 , a.getAndAccumulate(2 , Integer::sum));
mustEqual(3 , a.getAndAccumulate(3 , Integer::sum));
mustEqual(6 , a.get());
}
/**
* AtomicInteger accumulateAndGet updates with supplied function and
* returns result .
*/
public void testIntAccumulateAndGet() {
AtomicInteger a = new AtomicInteger(1 );
mustEqual(7 , a.accumulateAndGet(6 , Integer::sum));
mustEqual(10 , a.accumulateAndGet(3 , Integer::sum));
mustEqual(10 , a.get());
}
/**
* AtomicReference getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testReferenceGetAndUpdate() {
AtomicReference<Item> a = new AtomicReference<>(one);
mustEqual(1 , a.getAndUpdate(Atomic8Test::addItem17));
mustEqual(18 , a.getAndUpdate(Atomic8Test::addItem17));
mustEqual(35 , a.get());
}
/**
* AtomicReference updateAndGet updates with supplied function and
* returns result .
*/
public void testReferenceUpdateAndGet() {
AtomicReference<Item> a = new AtomicReference<>(one);
mustEqual(18 , a.updateAndGet(Atomic8Test::addItem17));
mustEqual(35 , a.updateAndGet(Atomic8Test::addItem17));
mustEqual(35 , a.get());
}
/**
* AtomicReference getAndAccumulate returns previous value and updates
* with supplied function .
*/
public void testReferenceGetAndAccumulate() {
AtomicReference<Item> a = new AtomicReference<>(one);
mustEqual( 1 , a.getAndAccumulate(two, Atomic8Test::sumItem));
mustEqual( 3 , a.getAndAccumulate(three, Atomic8Test::sumItem));
mustEqual( 6 , a.get());
}
/**
* AtomicReference accumulateAndGet updates with supplied function and
* returns result .
*/
public void testReferenceAccumulateAndGet() {
AtomicReference<Item> a = new AtomicReference<>(one);
mustEqual( 7 , a.accumulateAndGet(six, Atomic8Test::sumItem));
mustEqual( 10 , a.accumulateAndGet(three, Atomic8Test::sumItem));
mustEqual( 10 , a.get());
}
/**
* AtomicLongArray getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testLongArrayGetAndUpdate() {
AtomicLongArray a = new AtomicLongArray(1 );
a.set(0 , 1 );
mustEqual(1 L, a.getAndUpdate(0 , Atomic8Test::addLong17));
mustEqual(18 L, a.getAndUpdate(0 , Atomic8Test::addLong17));
mustEqual(35 L, a.get(0 ));
}
/**
* AtomicLongArray updateAndGet updates with supplied function and
* returns result .
*/
public void testLongArrayUpdateAndGet() {
AtomicLongArray a = new AtomicLongArray(1 );
a.set(0 , 1 );
mustEqual(18 L, a.updateAndGet(0 , Atomic8Test::addLong17));
mustEqual(35 L, a.updateAndGet(0 , Atomic8Test::addLong17));
mustEqual(35 L, a.get(0 ));
}
/**
* AtomicLongArray getAndAccumulate returns previous value and updates
* with supplied function .
*/
public void testLongArrayGetAndAccumulate() {
AtomicLongArray a = new AtomicLongArray(1 );
a.set(0 , 1 );
mustEqual(1 L, a.getAndAccumulate(0 , 2 L, Long ::sum));
mustEqual(3 L, a.getAndAccumulate(0 , 3 L, Long ::sum));
mustEqual(6 L, a.get(0 ));
}
/**
* AtomicLongArray accumulateAndGet updates with supplied function and
* returns result .
*/
public void testLongArrayAccumulateAndGet() {
AtomicLongArray a = new AtomicLongArray(1 );
a.set(0 , 1 );
mustEqual(7 L, a.accumulateAndGet(0 , 6 L, Long ::sum));
mustEqual(10 L, a.accumulateAndGet(0 , 3 L, Long ::sum));
mustEqual(10 L, a.get(0 ));
}
/**
* AtomicIntegerArray getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testIntArrayGetAndUpdate() {
AtomicIntegerArray a = new AtomicIntegerArray(1 );
a.set(0 , 1 );
mustEqual(1 , a.getAndUpdate(0 , Atomic8Test::addInt17));
mustEqual(18 , a.getAndUpdate(0 , Atomic8Test::addInt17));
mustEqual(35 , a.get(0 ));
}
/**
* AtomicIntegerArray updateAndGet updates with supplied function and
* returns result .
*/
public void testIntArrayUpdateAndGet() {
AtomicIntegerArray a = new AtomicIntegerArray(1 );
a.set(0 , 1 );
mustEqual(18 , a.updateAndGet(0 , Atomic8Test::addInt17));
mustEqual(35 , a.updateAndGet(0 , Atomic8Test::addInt17));
mustEqual(35 , a.get(0 ));
}
/**
* AtomicIntegerArray getAndAccumulate returns previous value and updates
* with supplied function .
*/
public void testIntArrayGetAndAccumulate() {
AtomicIntegerArray a = new AtomicIntegerArray(1 );
a.set(0 , 1 );
mustEqual(1 , a.getAndAccumulate(0 , 2 , Integer::sum));
mustEqual(3 , a.getAndAccumulate(0 , 3 , Integer::sum));
mustEqual(6 , a.get(0 ));
}
/**
* AtomicIntegerArray accumulateAndGet updates with supplied function and
* returns result .
*/
public void testIntArrayAccumulateAndGet() {
AtomicIntegerArray a = new AtomicIntegerArray(1 );
a.set(0 , 1 );
mustEqual(7 , a.accumulateAndGet(0 , 6 , Integer::sum));
mustEqual(10 , a.accumulateAndGet(0 , 3 , Integer::sum));
}
/**
* AtomicReferenceArray getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testReferenceArrayGetAndUpdate() {
AtomicReferenceArray<Item> a = new AtomicReferenceArray<>(1 );
a.set(0 , one);
mustEqual( 1 , a.getAndUpdate(0 , Atomic8Test::addItem17));
mustEqual( 18 , a.getAndUpdate(0 , Atomic8Test::addItem17));
mustEqual( 35 , a.get(0 ));
}
/**
* AtomicReferenceArray updateAndGet updates with supplied function and
* returns result .
*/
public void testReferenceArrayUpdateAndGet() {
AtomicReferenceArray<Item> a = new AtomicReferenceArray<>(1 );
a.set(0 , one);
mustEqual( 18 , a.updateAndGet(0 , Atomic8Test::addItem17));
mustEqual( 35 , a.updateAndGet(0 , Atomic8Test::addItem17));
}
/**
* AtomicReferenceArray getAndAccumulate returns previous value and updates
* with supplied function .
*/
public void testReferenceArrayGetAndAccumulate() {
AtomicReferenceArray<Item> a = new AtomicReferenceArray<>(1 );
a.set(0 , one);
mustEqual( 1 , a.getAndAccumulate(0 , two, Atomic8Test::sumItem));
mustEqual( 3 , a.getAndAccumulate(0 , three, Atomic8Test::sumItem));
mustEqual( 6 , a.get(0 ));
}
/**
* AtomicReferenceArray accumulateAndGet updates with supplied function and
* returns result .
*/
public void testReferenceArrayAccumulateAndGet() {
AtomicReferenceArray<Item> a = new AtomicReferenceArray<>(1 );
a.set(0 , one);
mustEqual( 7 , a.accumulateAndGet(0 , six, Atomic8Test::sumItem));
mustEqual( 10 , a.accumulateAndGet(0 , three, Atomic8Test::sumItem));
}
/**
* AtomicLongFieldUpdater getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testLongFieldUpdaterGetAndUpdate() {
AtomicLongFieldUpdater<Atomic8Test> a = aLongFieldUpdater();
a.set(this , 1 L);
mustEqual(1 L, a.getAndUpdate(this , Atomic8Test::addLong17));
mustEqual(18 L, a.getAndUpdate(this , Atomic8Test::addLong17));
mustEqual(35 L, a.get(this ));
mustEqual(35 L, aLongField);
}
/**
* AtomicLongFieldUpdater updateAndGet updates with supplied function and
* returns result .
*/
public void testLongFieldUpdaterUpdateAndGet() {
AtomicLongFieldUpdater<Atomic8Test> a = aLongFieldUpdater();
a.set(this , 1 L);
mustEqual(18 L, a.updateAndGet(this , Atomic8Test::addLong17));
mustEqual(35 L, a.updateAndGet(this , Atomic8Test::addLong17));
mustEqual(35 L, a.get(this ));
mustEqual(35 L, aLongField);
}
/**
* AtomicLongFieldUpdater getAndAccumulate returns previous value
* and updates with supplied function .
*/
public void testLongFieldUpdaterGetAndAccumulate() {
AtomicLongFieldUpdater<Atomic8Test> a = aLongFieldUpdater();
a.set(this , 1 L);
mustEqual(1 L, a.getAndAccumulate(this , 2 L, Long ::sum));
mustEqual(3 L, a.getAndAccumulate(this , 3 L, Long ::sum));
mustEqual(6 L, a.get(this ));
mustEqual(6 L, aLongField);
}
/**
* AtomicLongFieldUpdater accumulateAndGet updates with supplied
* function and returns result .
*/
public void testLongFieldUpdaterAccumulateAndGet() {
AtomicLongFieldUpdater<Atomic8Test> a = aLongFieldUpdater();
a.set(this , 1 L);
mustEqual(7 L, a.accumulateAndGet(this , 6 L, Long ::sum));
mustEqual(10 L, a.accumulateAndGet(this , 3 L, Long ::sum));
mustEqual(10 L, a.get(this ));
mustEqual(10 L, aLongField);
}
/**
* AtomicIntegerFieldUpdater getAndUpdate returns previous value and updates
* result of supplied function
*/
public void testIntegerFieldUpdaterGetAndUpdate() {
AtomicIntegerFieldUpdater<Atomic8Test> a = anIntFieldUpdater();
a.set(this , 1 );
mustEqual(1 , a.getAndUpdate(this , Atomic8Test::addInt17));
mustEqual(18 , a.getAndUpdate(this , Atomic8Test::addInt17));
mustEqual(35 , a.get(this ));
mustEqual(35 , anIntField);
}
/**
* AtomicIntegerFieldUpdater updateAndGet updates with supplied function and
* returns result .
*/
public void testIntegerFieldUpdaterUpdateAndGet() {
AtomicIntegerFieldUpdater<Atomic8Test> a = anIntFieldUpdater();
a.set(this , 1 );
mustEqual(18 , a.updateAndGet(this , Atomic8Test::addInt17));
mustEqual(35 , a.updateAndGet(this , Atomic8Test::addInt17));
mustEqual(35 , a.get(this ));
mustEqual(35 , anIntField);
}
/**
* AtomicIntegerFieldUpdater getAndAccumulate returns previous value
* and updates with supplied function .
*/
public void testIntegerFieldUpdaterGetAndAccumulate() {
AtomicIntegerFieldUpdater<Atomic8Test> a = anIntFieldUpdater();
a.set(this , 1 );
mustEqual(1 , a.getAndAccumulate(this , 2 , Integer::sum));
mustEqual(3 , a.getAndAccumulate(this , 3 , Integer::sum));
mustEqual(6 , a.get(this ));
mustEqual(6 , anIntField);
}
/**
* AtomicIntegerFieldUpdater accumulateAndGet updates with supplied
* function and returns result .
*/
public void testIntegerFieldUpdaterAccumulateAndGet() {
AtomicIntegerFieldUpdater<Atomic8Test> a = anIntFieldUpdater();
a.set(this , 1 );
mustEqual(7 , a.accumulateAndGet(this , 6 , Integer::sum));
mustEqual(10 , a.accumulateAndGet(this , 3 , Integer::sum));
mustEqual(10 , a.get(this ));
mustEqual(10 , anIntField);
}
/**
* AtomicReferenceFieldUpdater getAndUpdate returns previous value
* and updates result of supplied function
*/
public void testReferenceFieldUpdaterGetAndUpdate() {
AtomicReferenceFieldUpdater<Atomic8Test,Item> a = anItemFieldUpdater();
a.set(this , one);
mustEqual( 1 , a.getAndUpdate(this , Atomic8Test::addItem17));
mustEqual( 18 , a.getAndUpdate(this , Atomic8Test::addItem17));
mustEqual( 35 , a.get(this ));
mustEqual( 35 , anItemField);
}
/**
* AtomicReferenceFieldUpdater updateAndGet updates with supplied
* function and returns result .
*/
public void testReferenceFieldUpdaterUpdateAndGet() {
AtomicReferenceFieldUpdater<Atomic8Test,Item> a = anItemFieldUpdater();
a.set(this , one);
mustEqual( 18 , a.updateAndGet(this , Atomic8Test::addItem17));
mustEqual( 35 , a.updateAndGet(this , Atomic8Test::addItem17));
mustEqual( 35 , a.get(this ));
mustEqual( 35 , anItemField);
}
/**
* AtomicReferenceFieldUpdater returns previous value and updates
* with supplied function .
*/
public void testReferenceFieldUpdaterGetAndAccumulate() {
AtomicReferenceFieldUpdater<Atomic8Test,Item> a = anItemFieldUpdater();
a.set(this , one);
mustEqual( 1 , a.getAndAccumulate(this , two, Atomic8Test::sumItem));
mustEqual( 3 , a.getAndAccumulate(this , three, Atomic8Test::sumItem));
mustEqual( 6 , a.get(this ));
mustEqual( 6 , anItemField);
}
/**
* AtomicReferenceFieldUpdater accumulateAndGet updates with
* supplied function and returns result .
*/
public void testReferenceFieldUpdaterAccumulateAndGet() {
AtomicReferenceFieldUpdater<Atomic8Test,Item> a = anItemFieldUpdater();
a.set(this , one);
mustEqual( 7 , a.accumulateAndGet(this , six, Atomic8Test::sumItem));
mustEqual( 10 , a.accumulateAndGet(this , three, Atomic8Test::sumItem));
mustEqual( 10 , a.get(this ));
mustEqual( 10 , anItemField);
}
/**
* All Atomic getAndUpdate methods throw NullPointerException on
* null function argument
*/
@SuppressWarnings("unchecked" )
public void testGetAndUpdateNPE() {
assertThrows(
NullPointerException.class ,
() -> new AtomicLong().getAndUpdate(null ),
() -> new AtomicInteger().getAndUpdate(null ),
() -> new AtomicReference().getAndUpdate(null ),
() -> new AtomicLongArray(1 ).getAndUpdate(0 , null ),
() -> new AtomicIntegerArray(1 ).getAndUpdate(0 , null ),
() -> new AtomicReferenceArray(1 ).getAndUpdate(0 , null ),
() -> aLongFieldUpdater().getAndUpdate(this , null ),
() -> anIntFieldUpdater().getAndUpdate(this , null ),
() -> anItemFieldUpdater().getAndUpdate(this , null ));
}
/**
* All Atomic updateAndGet methods throw NullPointerException on null function argument
*/
@SuppressWarnings("unchecked" )
public void testUpdateAndGetNPE() {
assertThrows(
NullPointerException.class ,
() -> new AtomicLong().updateAndGet(null ),
() -> new AtomicInteger().updateAndGet(null ),
() -> new AtomicReference().updateAndGet(null ),
() -> new AtomicLongArray(1 ).updateAndGet(0 , null ),
() -> new AtomicIntegerArray(1 ).updateAndGet(0 , null ),
() -> new AtomicReferenceArray(1 ).updateAndGet(0 , null ),
() -> aLongFieldUpdater().updateAndGet(this , null ),
() -> anIntFieldUpdater().updateAndGet(this , null ),
() -> anItemFieldUpdater().updateAndGet(this , null ));
}
/**
* All Atomic getAndAccumulate methods throw NullPointerException
* on null function argument
*/
@SuppressWarnings("unchecked" )
public void testGetAndAccumulateNPE() {
assertThrows(
NullPointerException.class ,
() -> new AtomicLong().getAndAccumulate(1 L, null ),
() -> new AtomicInteger().getAndAccumulate(1 , null ),
() -> new AtomicReference().getAndAccumulate(one, null ),
() -> new AtomicLongArray(1 ).getAndAccumulate(0 , 1 L, null ),
() -> new AtomicIntegerArray(1 ).getAndAccumulate(0 , 1 , null ),
() -> new AtomicReferenceArray(1 ).getAndAccumulate(0 , one, null ),
() -> aLongFieldUpdater().getAndAccumulate(this , 1 L, null ),
() -> anIntFieldUpdater().getAndAccumulate(this , 1 , null ),
() -> anItemFieldUpdater().getAndAccumulate(this , one, null ));
}
/**
* All Atomic accumulateAndGet methods throw NullPointerException
* on null function argument
*/
@SuppressWarnings("unchecked" )
public void testAccumulateAndGetNPE() {
assertThrows(
NullPointerException.class ,
() -> new AtomicLong().accumulateAndGet(1 L, null ),
() -> new AtomicInteger().accumulateAndGet(1 , null ),
() -> new AtomicReference().accumulateAndGet(one, null ),
() -> new AtomicLongArray(1 ).accumulateAndGet(0 , 1 L, null ),
() -> new AtomicIntegerArray(1 ).accumulateAndGet(0 , 1 , null ),
() -> new AtomicReferenceArray(1 ).accumulateAndGet(0 , one, null ),
() -> aLongFieldUpdater().accumulateAndGet(this , 1 L, null ),
() -> anIntFieldUpdater().accumulateAndGet(this , 1 , null ),
() -> anItemFieldUpdater().accumulateAndGet(this , one, null ));
}
/**
* Object arguments for parameters of type T that are not
* instances of the class passed to the newUpdater call will
* result in a ClassCastException being thrown .
*/
@SuppressWarnings("unchecked" )
public void testFieldUpdaters_ClassCastException() {
// Use raw types to allow passing wrong object type, provoking CCE
final AtomicLongFieldUpdater longUpdater = aLongFieldUpdater();
final AtomicIntegerFieldUpdater intUpdater = anIntFieldUpdater();
final AtomicReferenceFieldUpdater refUpdater = anItemFieldUpdater();
for (Object x : new Object[]{ new Object(), null }) {
assertThrows(
ClassCastException.class ,
() -> longUpdater.get(x),
() -> intUpdater.get(x),
() -> refUpdater.get(x),
() -> longUpdater.set(x, 17 L),
() -> intUpdater.set(x, 17 ),
() -> refUpdater.set(x, new Item(17 )),
() -> longUpdater.addAndGet(x, 17 L),
() -> intUpdater.addAndGet(x, 17 ),
() -> longUpdater.getAndUpdate(x, y -> y),
() -> intUpdater.getAndUpdate(x, y -> y),
() -> refUpdater.getAndUpdate(x, y -> y),
() -> longUpdater.compareAndSet(x, 17 L, 42 L),
() -> intUpdater.compareAndSet(x, 17 , 42 ),
() -> refUpdater.compareAndSet(x, 17 , fortytwo));
}
}
}
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