/**
* Execute {@code HelloWorld} example on the grid.
*
* @param args Command line arguments, none required but if provided first one should point to the
* Spring XML configuration file. See {@code "examples/config/"} for configuration file
* examples.
* @throws GridException If example execution failed.
*/
public static void main(String[] args) throws GridException {
if (args.length == 0) {
G.start();
} else {
G.start(args[0]);
}
try {
// Broadcast this message to all nodes using GridClosure.
broadcastWordsClosure("Broadcasting This Message To All Nodes!");
// Print individual words from this phrase on different nodes
// using GridClosure
spreadWordsClosure("Print Worlds Functional Style!");
// Print this message using anonymous runnable object.
unicastWordsRunnable("Printing This Message From Runnable!");
// Split the message into words and pass them as arguments
// for remote execution of Callable objects.
countLettersCallable("Letter Count With Callable!");
// Split the message into words and pass them as arguments
// for remote execution of GridClosure objects.
countLettersClosure("Letter Count With Closure!");
// Split the message into words and pass them as arguments
// for remote execution of GridClosure objects and
// then aggregate results using GridReducer.
countLettersReducer("Letter Count With Reducer!");
} finally {
G.stop(true);
}
}
/**
* Prints a phrase on the grid nodes running anonymous closure objects and calculating total
* number of letters.
*
* @param phrase Phrase to print on of the grid nodes.
* @throws GridException If failed.
*/
private static void countLettersClosure(String phrase) throws GridException {
X.println(">>> Starting countLettersClosure() example...");
// Explicitly execute the collection of callable objects and receive a result.
Collection<Integer> results =
G.grid()
.call(
SPREAD,
new GridClosure<String, Integer>() { // Create executable logic.
@Override
public Integer apply(String word) {
// Print out a given word, just so we can
// see which node is doing what.
X.println(">>> Executing word: " + word);
// Return the length of a given word, i.e. number of letters.
return word.length();
}
},
Arrays.asList(phrase.split(" "))); // Collection of arguments for closures.
// Add up all results using convenience 'sum()' method.
int letterCnt = F.sum(results);
X.println(">>>");
X.println(">>> Finished execution of counting letters with closure based on GridGain 3.0 API.");
X.println(">>> You should see the phrase '" + phrase + "' printed out on the nodes.");
X.println(">>> Total number of letters in the phrase is '" + letterCnt + "'.");
X.println(">>> Check all nodes for output (this node is also part of the grid).");
X.println(">>>");
}
/**
* Prints a phrase on one of the grid nodes running anonymous runnable.
*
* @param phrase Phrase to print on one of the grid nodes.
* @throws GridException If failed.
*/
private static void unicastWordsRunnable(final String phrase) throws GridException {
X.println(">>> Starting unicastWordsRunnable() example...");
G.grid()
.run(
UNICAST,
new GridRunnable() {
@Override
public void run() {
X.println(">>> Printing phrase: " + phrase);
}
});
// NOTE:
//
// Alternatively, you can use existing closure 'F.println()' to
// print any text like so:
//
// G.grid().run(UNICAST, F.println(">>> Printing phrase: " + phrase));
//
X.println(">>>");
X.println(">>> Finished execution of runnable object based on GridGain 3.0 API.");
X.println(">>> You should see the phrase '" + phrase + "' printed out on one of the nodes.");
X.println(">>> Check all nodes for output (this node is also part of the grid).");
X.println(">>>");
}
/**
* Prints a phrase on the grid nodes running anonymous callable objects and calculating total
* number of letters.
*
* @param phrase Phrase to print on of the grid nodes.
* @throws GridException If failed.
*/
private static void countLettersCallable(String phrase) throws GridException {
X.println(">>> Starting countLettersCallable() example...");
Collection<Callable<Integer>> calls = new HashSet<Callable<Integer>>();
for (final String word : phrase.split(" "))
calls.add(
new GridCallable<Integer>() { // Create executable logic.
@Override
public Integer call() throws Exception {
// Print out a given word, just so we can
// see which node is doing what.
X.println(">>> Executing word: " + word);
// Return the length of a given word, i.e. number of letters.
return word.length();
}
});
// Explicitly execute the collection of callable objects and receive a result.
Collection<Integer> results = G.grid().call(SPREAD, calls);
// Add up all results using convenience 'sum()' method on GridFunc class.
int letterCnt = F.sum(results);
X.println(">>>");
X.println(
">>> Finished execution of counting letters with callables based on GridGain 3.0 API.");
X.println(">>> You should see the phrase '" + phrase + "' printed out on the nodes.");
X.println(">>> Total number of letters in the phrase is '" + letterCnt + "'.");
X.println(">>> Check all nodes for output (this node is also part of the grid).");
X.println(">>>");
}
/**
* Broadcasts a give phrase to all nodes.
*
* @param phrase Phrase to broadcast.
* @throws GridException If failed.
*/
private static void broadcastWordsClosure(final String phrase) throws GridException {
X.println(">>> Starting broadcastWordsClosure() example...");
G.grid()
.run(
BROADCAST,
new GridAbsClosure() {
@Override
public void apply() {
X.println(">>> Printing phrase: " + phrase);
}
});
// NOTE:
//
// Alternatively, you can use existing closure 'F.println()' to
// print any text like so:
//
// G.grid().run(BROADCAST, F.println(">>> Printing phrase: " + phrase));
//
X.println(">>>");
X.println(">>> Finished broadcasting a phrase to all grid nodes based on GridGain 3.0 API.");
X.println(">>> Check all nodes for output (this node is also part of the grid).");
X.println(">>>");
}
/**
* Prints every word a phrase on different nodes.
*
* @param phrase Phrase from which to print words on different nodes.
* @throws GridException If failed.
*/
private static void spreadWordsClosure(String phrase) throws GridException {
X.println(">>> Starting spreadWordsClosure() example...");
// Splits the passed in phrase into words and prints every word
// on a individual grid node. If there are more words than nodes -
// some nodes will print more than one word.
G.grid()
.run(
SPREAD,
F.yield(
phrase.split(" "),
new GridInClosure<String>() {
@Override
public void apply(String word) {
X.println(word);
}
}));
// NOTE:
//
// Alternatively, you can use existing closure 'F.println()' to
// print any yield result in 'F.yield()' like so:
//
// G.grid().run(SPREAD, F.yield(phrase.split(" "), F.println()));
//
X.println(">>>");
X.println(
">>> Finished printing individual words on different nodes based on GridGain 3.0 API.");
X.println(">>> Check all nodes for output (this node is also part of the grid).");
X.println(">>>");
}
/**
* Check if flags in correct state.
*
* @param msg Message.
*/
private void checkSyncFlags(GridIoMessage msg) {
if (!commSpiEnabled) return;
Object o = msg.message();
if (!(o instanceof GridDistributedLockRequest)) return;
GridKernal g = (GridKernal) G.grid(nodeId);
GridCacheTxManager<Object, Object> tm =
g.internalCache(REPLICATED_ASYNC_CACHE_NAME).context().tm();
GridCacheVersion v = ((GridCacheVersionable) o).version();
GridCacheTxEx t = tm.tx(v);
if (t.hasWriteKey("x1")) {
assertFalse(t.syncCommit());
} else if (t.hasWriteKey("x2")) {
assertTrue(t.syncCommit());
} else if (t.hasWriteKey("x3")) {
assertFalse(t.syncCommit());
} else if (t.hasWriteKey("x4")) {
assertTrue(t.syncCommit());
}
}
/** @throws Exception If failed. */
public void testDisabledRest() throws Exception {
restEnabled = false;
final Grid g = startGrid("disabled-rest");
try {
Thread.sleep(2 * TOP_REFRESH_FREQ);
// As long as we have round robin load balancer this will cause every node to be queried.
for (int i = 0; i < NODES_CNT + 1; i++)
assertEquals(NODES_CNT + 1, client.compute().refreshTopology(false, false).size());
final GridClientData data = client.data(PARTITIONED_CACHE_NAME);
// Check rest-disabled node is unavailable.
try {
String affKey;
do {
affKey = UUID.randomUUID().toString();
} while (!data.affinity(affKey).equals(g.localNode().id()));
data.put(affKey, "asdf");
assertEquals("asdf", cache(0, PARTITIONED_CACHE_NAME).get(affKey));
} catch (GridServerUnreachableException e) {
// Thrown for direct client-node connections.
assertTrue(
"Unexpected exception message: " + e.getMessage(),
e.getMessage()
.startsWith("No available endpoints to connect (is rest enabled for this node?)"));
} catch (GridClientException e) {
// Thrown for routed client-router-node connections.
String msg = e.getMessage();
assertTrue(
"Unexpected exception message: " + msg,
protocol() == GridClientProtocol.TCP
? msg.contains("No available endpoints to connect (is rest enabled for this node?)")
: // TCP router.
msg.startsWith(
"No available nodes on the router for destination node ID")); // HTTP router.
}
// Check rest-enabled nodes are available.
String affKey;
do {
affKey = UUID.randomUUID().toString();
} while (data.affinity(affKey).equals(g.localNode().id()));
data.put(affKey, "fdsa");
assertEquals("fdsa", cache(0, PARTITIONED_CACHE_NAME).get(affKey));
} finally {
restEnabled = true;
G.stop(g.name(), true);
}
}
/** @throws Exception If failed. */
public void testInvalidateFlag() throws Exception {
GridEx g0 = grid(0);
GridCache<String, String> cache = g0.cache(PARTITIONED_CACHE_NAME);
String key = null;
for (int i = 0; i < 10_000; i++) {
if (!cache.affinity().isPrimaryOrBackup(g0.localNode(), String.valueOf(i))) {
key = String.valueOf(i);
break;
}
}
assertNotNull(key);
cache.put(key, key); // Create entry in near cache, it is invalidated if INVALIDATE flag is set.
assertNotNull(cache.peek(key));
GridClientData d = client.data(PARTITIONED_CACHE_NAME);
d.flagsOn(GridClientCacheFlag.INVALIDATE).put(key, "zzz");
for (Grid g : G.allGrids()) {
cache = g.cache(PARTITIONED_CACHE_NAME);
if (cache.affinity().isPrimaryOrBackup(g.localNode(), key))
assertEquals("zzz", cache.peek(key));
else assertNull(cache.peek(key));
}
}
/**
* Calculates length of a given phrase on the grid.
*
* @param phrase Phrase to count the number of letters in.
* @throws GridException If failed.
*/
private static void countLettersReducer(String phrase) throws GridException {
X.println(">>> Starting countLettersReducer() example...");
Grid grid = G.grid();
// Logger to use in your closure. Note that even though we assign it
// to a local variable, GridGain still allows to use it from remotely
// executed code.
final GridLogger log = grid.log();
// Execute Hello World task.
int letterCnt =
grid.reduce(
BALANCE,
new GridClosure<String, Integer>() { // Create executable logic.
@Override
public Integer apply(String word) {
// Print out a given word, just so we can
// see which node is doing what.
log.info(">>> Calculating for word: " + word);
// Return the length of a given word, i.e. number of letters.
return word.length();
}
},
Arrays.asList(phrase.split(" ")), // Collection of words.
// Create custom reducer.
// NOTE: Alternatively, you can use existing reducer: F.sumIntReducer()
new GridReducer<Integer, Integer>() {
private int sum;
@Override
public boolean collect(Integer res) {
sum += res;
return true; // True means continue collecting until last result.
}
@Override
public Integer apply() {
return sum;
}
});
X.println(">>>");
X.println(">>> Finished execution of counting letters with reducer based on GridGain 3.0 API.");
X.println(">>> Total number of letters in the phrase is '" + letterCnt + "'.");
X.println(">>> You should see individual words printed out on different nodes.");
X.println(">>> Check all nodes for output (this node is also part of the grid).");
X.println(">>>");
}
/**
* Executes information gathering example with closures.
*
* @param args Command line arguments, none required but if provided first one should point to the
* Spring XML configuration file. See {@code "examples/config/"} for configuration file
* examples.
* @throws GridException If example execution failed.
*/
public static void main(String[] args) throws Exception {
// Typedefs:
// ---------
// G -> GridFactory
// CI1 -> GridInClosure
// CO -> GridOutClosure
// CA -> GridAbsClosure
// F -> GridFunc
G.in(
args.length == 0 ? null : args[0],
new CIX1<Grid>() {
@Override
public void applyx(Grid g) throws GridException {
// Broadcast closure to all nodes for gathering their system information.
String res =
g.reduce(
GridClosureCallMode.BROADCAST,
Collections.<GridOutClosure<String>>singleton(
new CO<String>() {
@Override
public String apply() {
StringBuilder buf = new StringBuilder();
buf.append("OS: ")
.append(System.getProperty("os.name"))
.append(" ")
.append(System.getProperty("os.version"))
.append(" ")
.append(System.getProperty("os.arch"))
.append("\nUser: "******"user.name"))
.append("\nJRE: ")
.append(System.getProperty("java.runtime.name"))
.append(" ")
.append(System.getProperty("java.runtime.version"));
return buf.toString();
}
}),
new R1<String, String>() {
private StringBuilder buf = new StringBuilder();
@Override
public boolean collect(String s) {
buf.append("\n").append(s).append("\n");
return true;
}
@Override
public String apply() {
return buf.toString();
}
});
// Print result.
X.println("Nodes system information:");
X.println(res);
}
});
}
/**
* @param args Command arguments.
* @throws GridException If failed.
*/
public static void main(String[] args) throws GridException {
// Starts grid.
Grid grid = args.length == 0 ? G.start() : G.start(args[0]);
try {
// Create portfolio.
GridCredit[] portfolio = new GridCredit[5000];
Random rnd = new Random();
// Generate some test portfolio items.
for (int i = 0; i < portfolio.length; i++) {
portfolio[i] =
new GridCredit(
50000 * rnd.nextDouble(), // Credit amount.
rnd.nextInt(1000), // Credit term in days.
rnd.nextDouble() / 10, // APR.
rnd.nextDouble() / 20 + 0.02 // EDF.
);
}
// Forecast horizon in days.
int horizon = 365;
// Number of Monte-Carlo iterations.
int iter = 10000;
// Percentile.
double percentile = 0.95;
// Mark the stopwatch.
long start = System.currentTimeMillis();
// Calculate credit risk and print it out.
// As you can see the grid enabling is completely hidden from the caller
// and it is fully transparent to him. In fact, the caller is never directly
// aware if method was executed just locally or on the 100s of grid nodes.
// Credit risk crdRisk is the minimal amount that creditor has to have
// available to cover possible defaults.
double crdRisk =
grid.reduce(
SPREAD,
closures(grid.size(), portfolio, horizon, iter, percentile),
new R1<Double, Double>() {
/** Collected values sum. */
private double sum;
/** Collected values count. */
private int count;
/** {@inheritDoc} */
@Override
public boolean collect(Double e) {
sum += e;
count++;
return true;
}
/** {@inheritDoc} */
@Override
public Double apply() {
return sum / count;
}
});
X.println(
"Credit risk [crdRisk="
+ crdRisk
+ ", duration="
+ (System.currentTimeMillis() - start)
+ "ms]");
}
// We specifically don't do any error handling here to
// simplify the example. Real application may want to
// add error handling and application specific recovery.
finally {
// Stops grid.
G.stop(true);
}
}
/**
* Runs basic cache example.
*
* @param args Command line arguments, none required.
* @throws Exception If example execution failed.
*/
public static void main(String[] args) throws Exception {
final Grid g =
args.length == 0 ? G.start("examples/config/spring-cache.xml") : G.start(args[0]);
try {
// Subscribe to events on every node, so we can visualize what's
// happening in remote caches.
g.run(
BROADCAST,
new CA() {
@Override
public void apply() {
GridLocalEventListener lsnr =
new GridLocalEventListener() {
@Override
public void onEvent(GridEvent event) {
switch (event.type()) {
case EVT_CACHE_OBJECT_PUT:
case EVT_CACHE_OBJECT_READ:
case EVT_CACHE_OBJECT_REMOVED:
{
GridCacheEvent e = (GridCacheEvent) event;
X.println("Cache event [name=" + e.name() + ", key=" + e.key() + ']');
}
}
}
};
GridNodeLocal<String, GridLocalEventListener> loc = g.nodeLocal();
GridLocalEventListener prev = loc.remove("lsnr");
// If there is a listener subscribed from previous runs, unsubscribe it.
if (prev != null) g.removeLocalEventListener(prev);
// Record new listener, so we can check it on next run.
loc.put("lsnr", lsnr);
// Subscribe listener.
g.addLocalEventListener(lsnr, EVTS_CACHE);
}
});
final GridCacheProjection<Integer, String> cache =
g.cache(CACHE_NAME).projection(Integer.class, String.class);
final int keyCnt = 20;
// Store keys in cache.
for (int i = 0; i < keyCnt; i++) cache.putx(i, Integer.toString(i));
// Peek and get on local node.
for (int i = 0; i < keyCnt; i++) {
X.println("Peeked [key=" + i + ", val=" + cache.peek(i) + ']');
X.println("Got [key=" + i + ", val=" + cache.get(i) + ']');
}
// Projection (view) for remote nodes.
GridProjection rmts = g.remoteProjection();
if (!rmts.isEmpty()) {
// Peek and get on remote nodes (comment it out if output gets too crowded).
g.remoteProjection()
.run(
BROADCAST,
new GridAbsClosureX() {
@Override
public void applyx() throws GridException {
for (int i = 0; i < keyCnt; i++) {
X.println("Peeked [key=" + i + ", val=" + cache.peek(i) + ']');
X.println("Got [key=" + i + ", val=" + cache.get(i) + ']');
}
}
});
}
} finally {
G.stop(true);
}
}
