hw1pool: initial commit

.travis.yml

@@ -1,6 +1,6 @@
 language: java
 jdk: oraclejdk8
-install:
-- mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
+before_install:
+  - chmod +x buildscript
 script: ./buildscript
 os: linux

buildscript

@@ -1 +1,9 @@
-mvn test -B
+rootdir=$(pwd)
+for dir in $(find . -maxdepth 1 -type d); do
+	if [ "$dir" != "." ] && [ "$dir" != "./.git" ]; then
+		cd $dir		
+		mvn test -B
+		cd $rootdir
+	fi	
+done	
+

hw1pool/hw1pool.iml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.9" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: com.github.stefanbirkner:system-rules:1.16.0" level="project" />
+    <orderEntry type="library" name="Maven: com.intellij:annotations:12.0" level="project" />
+  </component>
+</module>

hw1pool/pom.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.spbau.group202.sharkova</groupId>
+    <artifactId>hw1pool</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/junit/junit -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.9</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>com.github.stefanbirkner</groupId>
+            <artifactId>system-rules</artifactId>
+            <version>1.16.0</version>
+            <scope>test</scope>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/com.intellij/annotations -->
+        <dependency>
+            <groupId>com.intellij</groupId>
+            <artifactId>annotations</artifactId>
+            <version>12.0</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.source>1.8</maven.compiler.source>
+    </properties>
+
+</project>

hw1pool/src/main/java/ru/spbau/group202/sharkova/hw1pool/LightExecutionException.java

@@ -0,0 +1,11 @@
+package ru.spbau.group202.sharkova.hw1pool;
+
+/**
+ * This exception is thrown by LightFuture get() method
+ * whenever an exception occurred during supplier get() method execution.
+ */
+public class LightExecutionException extends Exception {
+    LightExecutionException(Exception e) {
+        super(e);
+    }
+}

hw1pool/src/main/java/ru/spbau/group202/sharkova/hw1pool/LightFuture.java

@@ -0,0 +1,33 @@
+package ru.spbau.group202.sharkova.hw1pool;
+
+import java.util.function.Function;
+
+/**
+ * This interface represents a task for a thread pool.
+ * Available methods: check if the task is completed,
+ * get task result, chain the execution result to another task.
+ * @param <T> task execution result type parameter
+ * */
+public interface LightFuture<T> {
+    /**
+     * Indicates the state of the task.
+     * @return true if the task is completed.
+     */
+    boolean isReady();
+
+    /**
+     * Returns task execution result;
+     * if not completed, waits until the execution is finished.
+     * @throws LightExecutionException if the corresponding supplier
+     * throws an exception.
+     * */
+    T get() throws LightExecutionException;
+
+    /**
+     * Takes current task result and applies a given Function object
+     * to it, creating a new task.
+     * @param function the task that uses the current task result
+     * @return a new task
+     * */
+    LightFuture<T> thenApply(Function<T, T> function);
+}