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/*-
* Public Domain 2014-present MongoDB, Inc.
* Public Domain 2008-2014 WiredTiger, Inc.
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* 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 NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS 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.
*
* ex_thread.java
* This is an example demonstrating how to create and access a simple
* table from multiple threads.
*/
package com.wiredtiger.examples;
import com.wiredtiger.db.*;
import java.io.*;
import java.util.*;
/*! [thread scan] */
class ScanThread extends Thread {
private Connection conn;
public ScanThread(Connection conn) {
this.conn = conn;
}
public void run()
{
try {
int ret;
Session session = conn.open_session(null);
Cursor cursor = session.open_cursor("table:access", null, null);
/* Show all records. */
while ((ret = cursor.next()) == 0) {
String key = cursor.getKeyString();
String value = cursor.getValueString();
System.out.println("Got record: " + key + " : " + value);
}
if (ret != wiredtiger.WT_NOTFOUND)
System.err.println("Cursor.next: " +
wiredtiger.wiredtiger_strerror(ret));
cursor.close();
session.close(null);
} catch (WiredTigerException wte) {
System.err.println("Exception " + wte);
}
}
}
/*! [thread scan] */
public class ex_thread {
public static String home;
public static final int NUM_THREADS = 10;
/*! [thread main] */
public static void main(String[] argv)
{
try {
Thread[] threads = new Thread[NUM_THREADS];
int i, ret;
Connection conn;
/*
* Create a clean test directory for this run of the test program if the
* environment variable isn't already set (as is done by make check).
*/
if (System.getenv("WIREDTIGER_HOME") == null) {
home = "WT_HOME";
try {
Process proc = Runtime.getRuntime().exec("/bin/rm -rf " + home);
BufferedReader br = new BufferedReader(
new InputStreamReader(proc.getInputStream()));
while(br.ready())
System.out.println(br.readLine());
br.close();
proc.waitFor();
if (!(new File(home)).mkdir())
System.err.println("mkdir: failed");
} catch (Exception ex) {
System.err.println("Exception: " + home + ": " + ex);
System.exit(1);
}
} else
home = null;
if ((conn = wiredtiger.open(home, "create")) == null) {
System.err.println("Error connecting to " + home);
System.exit(1);
}
/* Note: further error checking omitted for clarity. */
Session session = conn.open_session(null);
ret = session.create("table:access", "key_format=S,value_format=S");
Cursor cursor = session.open_cursor("table:access", null, "overwrite");
cursor.putKeyString("key1");
cursor.putValueString("value1");
ret = cursor.insert();
cursor.close();
ret = session.close(null);
for (i = 0; i < NUM_THREADS; i++) {
threads[i] = new ScanThread(conn);
threads[i].start();
}
for (i = 0; i < NUM_THREADS; i++)
try {
threads[i].join();
ret = -1;
}
catch (InterruptedException ie) {
}
ret = conn.close(null);
System.exit(ret);
}
catch (WiredTigerException wte) {
System.err.println("Exception: " + wte);
wte.printStackTrace();
System.exit(1);
}
}
/*! [thread main] */
}
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