From 7caa5b1f1e08f99cfe4465f091f47e2966d78aa7 Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Sun, 23 Jun 2013 09:37:57 +0200
Subject: o Initial import of JDBC queue.

---
 .../io/trygvis/spring/SpringJdbcAsyncService.java  | 110 +++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 src/main/java/io/trygvis/spring/SpringJdbcAsyncService.java

(limited to 'src/main/java/io/trygvis/spring/SpringJdbcAsyncService.java')

diff --git a/src/main/java/io/trygvis/spring/SpringJdbcAsyncService.java b/src/main/java/io/trygvis/spring/SpringJdbcAsyncService.java
new file mode 100644
index 0000000..12dc71e
--- /dev/null
+++ b/src/main/java/io/trygvis/spring/SpringJdbcAsyncService.java
@@ -0,0 +1,110 @@
+package io.trygvis.spring;
+
+import io.trygvis.async.AsyncService;
+import io.trygvis.async.JdbcAsyncService;
+import io.trygvis.async.QueueController;
+import io.trygvis.queue.SqlEffect;
+import io.trygvis.queue.JdbcQueueService;
+import io.trygvis.queue.Queue;
+import io.trygvis.queue.QueueExecutor;
+import io.trygvis.queue.QueueService;
+import io.trygvis.queue.QueueSystem;
+import io.trygvis.queue.Task;
+import io.trygvis.queue.TaskEffect;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.jdbc.core.ConnectionCallback;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.support.TransactionSynchronization;
+import org.springframework.transaction.support.TransactionSynchronizationAdapter;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Date;
+import java.util.List;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+
+import static org.springframework.transaction.annotation.Propagation.REQUIRED;
+import static org.springframework.transaction.support.TransactionSynchronizationManager.registerSynchronization;
+
+public class SpringJdbcAsyncService implements AsyncService {
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    private final ScheduledThreadPoolExecutor executor;
+
+    private final JdbcTemplate jdbcTemplate;
+
+    private final JdbcAsyncService jdbcAsyncService;
+
+    private final JdbcQueueService queueService;
+
+    private final QueueSystem queueSystem;
+
+    public SpringJdbcAsyncService(QueueSystem queueSystem, JdbcTemplate jdbcTemplate) {
+        this.queueSystem = queueSystem;
+        this.jdbcTemplate = jdbcTemplate;
+        jdbcAsyncService = new JdbcAsyncService(queueSystem);
+        queueService = queueSystem.createQueueService();
+        executor = new ScheduledThreadPoolExecutor(10, Executors.defaultThreadFactory());
+    }
+
+    @Transactional(propagation = REQUIRED)
+    public QueueController registerQueue(final Queue queue, final QueueService.TaskExecutionRequest req, final TaskEffect processor) throws SQLException {
+        QueueExecutor queueExecutor = queueSystem.sqlEffectExecutor.transaction(new SqlEffect<QueueExecutor>() {
+            @Override
+            public QueueExecutor doInConnection(Connection c) throws SQLException {
+                return queueService.lookupQueue(c, queue.name, queue.interval, true);
+            }
+        });
+
+        final QueueController queueController = jdbcAsyncService.registerQueue(queueExecutor, req, processor);
+
+        registerSynchronization(new TransactionSynchronizationAdapter() {
+            public void afterCompletion(int status) {
+                log.info("Transaction completed with status = {}", status);
+                if (status == TransactionSynchronization.STATUS_COMMITTED) {
+                    queueController.start(executor);
+                }
+            }
+        });
+
+        return queueController;
+    }
+
+    public QueueExecutor getQueue(String name) {
+        return jdbcAsyncService.getQueue(name);
+    }
+
+    @Transactional(propagation = REQUIRED)
+    public Task schedule(final Queue queue, final Date scheduled, final List<String> args) {
+        return jdbcTemplate.execute(new ConnectionCallback<Task>() {
+            @Override
+            public Task doInConnection(Connection c) throws SQLException {
+                QueueExecutor queueExecutor = queueService.getQueue(queue.name);
+                return queueExecutor.schedule(c, scheduled, args);
+            }
+        });
+    }
+
+    public Task schedule(final Queue queue, final long parent, final Date scheduled, final List<String> args) {
+        return jdbcTemplate.execute(new ConnectionCallback<Task>() {
+            @Override
+            public Task doInConnection(Connection c) throws SQLException {
+                QueueExecutor queueExecutor = queueService.getQueue(queue.name);
+                return queueExecutor.schedule(c, parent, scheduled, args);
+            }
+        });
+    }
+
+    @Transactional(readOnly = true)
+    public Task update(final Task ref) {
+        return jdbcTemplate.execute(new ConnectionCallback<Task>() {
+            @Override
+            public Task doInConnection(Connection c) throws SQLException {
+                return jdbcAsyncService.update(c, ref);
+            }
+        });
+    }
+}
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