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This commit is contained in:
Fabio Scotto di Santolo
2020-05-10 11:53:01 +02:00
parent a80d64735b
commit 9b85eed528
9 changed files with 315 additions and 172 deletions
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111
.gitignore vendored
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@@ -1,6 +1,92 @@
# Add any directories, files, or patterns you don't want to be tracked by version control
# Created by https://www.gitignore.io/api/Java
# Edit at https://www.gitignore.io/?templates=Java
# Created by https://www.gitignore.io/api/java,maven,intellij,sonar
# Edit at https://www.gitignore.io/?templates=java,maven,intellij,sonar
### Intellij ###
# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
# User-specific stuff
.idea/**/workspace.xml
.idea/**/tasks.xml
.idea/**/usage.statistics.xml
.idea/**/dictionaries
.idea/**/shelf
# Generated files
.idea/**/contentModel.xml
# Sensitive or high-churn files
.idea/**/dataSources/
.idea/**/dataSources.ids
.idea/**/dataSources.local.xml
.idea/**/sqlDataSources.xml
.idea/**/dynamic.xml
.idea/**/uiDesigner.xml
.idea/**/dbnavigator.xml
# Gradle
.idea/**/gradle.xml
.idea/**/libraries
# Gradle and Maven with auto-import
# When using Gradle or Maven with auto-import, you should exclude module files,
# since they will be recreated, and may cause churn. Uncomment if using
# auto-import.
.idea/modules.xml
.idea/*.iml
.idea/modules
*.iml
*.ipr
# CMake
cmake-build-*/
# Mongo Explorer plugin
.idea/**/mongoSettings.xml
# File-based project format
*.iws
# IntelliJ
out/
# mpeltonen/sbt-idea plugin
.idea_modules/
# JIRA plugin
atlassian-ide-plugin.xml
# Cursive Clojure plugin
.idea/replstate.xml
# Crashlytics plugin (for Android Studio and IntelliJ)
com_crashlytics_export_strings.xml
crashlytics.properties
crashlytics-build.properties
fabric.properties
# Editor-based Rest Client
.idea/httpRequests
# Android studio 3.1+ serialized cache file
.idea/caches/build_file_checksums.ser
### Intellij Patch ###
# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
modules.xml
.idea/misc.xml
# Sonarlint plugin
.idea/**/sonarlint/
# SonarQube Plugin
.idea/**/sonarIssues.xml
# Markdown Navigator plugin
.idea/**/markdown-navigator.xml
.idea/**/markdown-navigator/
### Java ###
# Compiled class file
@@ -27,4 +113,21 @@
# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid*
# End of https://www.gitignore.io/api/Java
### Maven ###
target/
pom.xml.tag
pom.xml.releaseBackup
pom.xml.versionsBackup
pom.xml.next
release.properties
dependency-reduced-pom.xml
buildNumber.properties
.mvn/timing.properties
.mvn/wrapper/maven-wrapper.jar
.flattened-pom.xml
### Sonar ###
#Sonar generated dir
/.sonar/
# End of https://www.gitignore.io/api/java,maven,intellij,sonar

167
.idea/workspace.xml generated
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@@ -1,167 +0,0 @@
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<property name="RunOnceActivity.OpenProjectViewOnStart" value="true" />
<property name="RunOnceActivity.ShowReadmeOnStart" value="true" />
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<option name="MAIN_CLASS_NAME" value="com.oracle.java8.associate.InnerClassDemo" />
<module name="OracleCertificationTest" />
<extension name="coverage">
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2
OracleCertificationTest.iml
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@@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager">
<output url="file://$MODULE_DIR$/bin" />
<output url="file://$MODULE_DIR$/out" />
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<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />

51
src/com/oracle/java8/professional/ConcurrencyTest.java Normal file
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package com.oracle.java8.professional;
import com.oracle.java8.professional.concurrency.BankAccount;
import com.oracle.java8.professional.concurrency.Data;
import com.oracle.java8.professional.concurrency.Receiver;
import com.oracle.java8.professional.concurrency.Sender;
public class ConcurrencyTest {
public static void main(String[] args) {
doBankAccoundDemo();
doSynchronizeThreadDemo();
}
private static void doBankAccoundDemo() {
BankAccount bankAccount = new BankAccount(1, 100);
Thread worker1 = new Thread(() -> {
System.out.printf("[Thread %s] read current balance = %d\n",
Thread.currentThread().getName(), bankAccount.getBalance());
bankAccount.deposit(10);
});
Thread worker2 = new Thread(() -> {
System.out.printf("[Thread %s] read current balance = %d\n",
Thread.currentThread().getName(), bankAccount.getBalance());
bankAccount.deposit(10000);
});
worker1.start();
worker2.start();
try {
worker1.join();
worker2.join();
System.out.println("Final balance is " + bankAccount.getBalance());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
private static void doSynchronizeThreadDemo() {
Data data = new Data();
Thread sender = new Thread(new Sender(data));
Thread receiver = new Thread(new Receiver(data));
sender.start();
receiver.start();
}
}

19
src/com/oracle/java8/professional/concurrency/BankAccount.java Normal file
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@@ -0,0 +1,19 @@
package com.oracle.java8.professional.concurrency;
public class BankAccount {
private long number;
private long balance;
public BankAccount(long number, long balance) {
this.number = number;
this.balance = balance;
}
public synchronized long getBalance() {
return balance;
}
public synchronized void deposit(long amout) {
balance += amout;
}
}

40
src/com/oracle/java8/professional/concurrency/Data.java Normal file
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@@ -0,0 +1,40 @@
package com.oracle.java8.professional.concurrency;
import java.util.logging.Level;
import java.util.logging.Logger;
public class Data {
private String packet;
private boolean transfer = true;
public synchronized void send(String packet) {
while (!transfer) {
try {
wait();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
Logger.getAnonymousLogger().log(Level.SEVERE, "Interrupted error", e);
}
}
transfer = false;
this.packet = packet;
notifyAll();
}
public synchronized String receive() {
while (transfer) {
try {
wait();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
Logger.getAnonymousLogger().log(Level.SEVERE, "Interrupted error", e);
}
}
transfer = true;
notifyAll();
return packet;
}
}

29
src/com/oracle/java8/professional/concurrency/PingPong.java Normal file
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@@ -0,0 +1,29 @@
package com.oracle.java8.professional.concurrency;
public class PingPong extends Thread {
private String word;
private int delay;
public PingPong(String whatToSay, int delayTime) {
this.word = whatToSay;
this.delay = delayTime;
}
@Override
public void run() {
try {
for (;;) {
System.out.println(word + " ");
Thread.sleep(delay);
}
} catch (InterruptedException e) {
return;
}
}
public static void main(String[] args) {
System.out.println(Thread.currentThread().getName());
new PingPong("ping", 33).start();
new PingPong("PONG", 100).start();
}
}

31
src/com/oracle/java8/professional/concurrency/Receiver.java Normal file
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@@ -0,0 +1,31 @@
package com.oracle.java8.professional.concurrency;
import java.util.concurrent.ThreadLocalRandom;
import java.util.logging.Level;
import java.util.logging.Logger;
public class Receiver implements Runnable {
private Data load;
public Receiver(Data data) {
this.load = data;
}
public void run() {
for (String receivedMessage = load.receive();
!"End".equals(receivedMessage);
receivedMessage = load.receive()) {
System.out.println(receivedMessage);
// ...
try {
Thread.sleep(ThreadLocalRandom.current().nextInt(1000, 5000));
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
Logger.getAnonymousLogger().log(Level.SEVERE, "Interrupted error", e);
}
}
}
}

37
src/com/oracle/java8/professional/concurrency/Sender.java Normal file
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@@ -0,0 +1,37 @@
package com.oracle.java8.professional.concurrency;
import java.util.concurrent.ThreadLocalRandom;
import java.util.logging.Level;
import java.util.logging.Logger;
public class Sender implements Runnable {
private Data data;
public Sender(Data data) {
this.data = data;
}
@Override
public void run() {
String packets[] = {
"First packet",
"Second packet",
"Third packet",
"Fourth packet",
"End"
};
for (String packet : packets) {
data.send(packet);
// Thread.sleep() to mimic heavy server-side processing
try {
Thread.sleep(ThreadLocalRandom.current().nextInt(1000, 5000));
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
Logger.getAnonymousLogger().log(Level.SEVERE, "Interrupted error", e);
}
}
}
}