Merge branch '__rultor'

src/main/java/com/yegor256/tojos/TjSynchronized.java

@@ -0,0 +1,69 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2022 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.yegor256.tojos;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.function.Predicate;
+
+/**
+ * All Tojos in a {@link Mono}.
+ *
+ * The class is thread-safe.
+ *
+ * @since 0.3.0
+ */
+public final class TjSynchronized implements Tojos {
+
+    /**
+     * The wrapped tojos.
+     */
+    private final Tojos wrapped;
+
+    /**
+     * Ctor.
+     *
+     * @param tojos The tojos
+     */
+    public TjSynchronized(final Tojos tojos) {
+        this.wrapped = tojos;
+    }
+
+    @Override
+    public Tojo add(final String name) {
+        synchronized (this.wrapped) {
+            return this.wrapped.add(name);
+        }
+    }
+
+    @Override
+    public List<Tojo> select(final Predicate<Tojo> filter) {
+        return this.wrapped.select(filter);
+    }
+
+    @Override
+    public void close() throws IOException {
+        this.wrapped.close();
+    }
+}

src/test/java/com/yegor256/tojos/TjSynchronizedTest.java

@@ -0,0 +1,69 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2022 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.yegor256.tojos;
+
+import java.nio.file.Path;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.io.TempDir;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+/**
+ * Test case for {@link TjSynchronized}.
+ *
+ * @since 0.3.0
+ */
+class TjSynchronizedTest {
+
+    @ParameterizedTest
+    @ValueSource(strings = {"x.csv", "x.json"})
+    void addTojoParallel(final String file, @TempDir final Path temp) throws InterruptedException {
+        final Tojos tojos = new TjSynchronized(new TjDefault(new MnJson(temp.resolve(file))));
+        final int threads = 100;
+        final ExecutorService service = Executors.newFixedThreadPool(threads);
+        final CountDownLatch latch = new CountDownLatch(1);
+        for (int idx = 0; idx < threads; ++idx) {
+            final int curr = idx;
+            service.submit(
+                (Callable<?>) () -> {
+                    latch.await();
+                    return tojos.add("foo".concat(String.valueOf(curr)));
+                }
+            );
+        }
+        latch.countDown();
+        service.shutdown();
+        assert service.awaitTermination(1, TimeUnit.MINUTES);
+        MatcherAssert.assertThat(
+            new TjSmart(tojos).size(),
+            Matchers.equalTo(threads)
+        );
+    }
+}