/** @return Client configuration for the test. */
protected GridClientConfiguration clientConfiguration() throws GridClientException {
GridClientConfiguration cfg = new GridClientConfiguration();
cfg.setBalancer(getBalancer());
cfg.setTopologyRefreshFrequency(TOP_REFRESH_FREQ);
cfg.setProtocol(protocol());
cfg.setServers(Arrays.asList(serverAddress()));
cfg.setSslContextFactory(sslContextFactory());
GridClientDataConfiguration loc = new GridClientDataConfiguration();
GridClientDataConfiguration partitioned = new GridClientDataConfiguration();
partitioned.setName(PARTITIONED_CACHE_NAME);
partitioned.setAffinity(new GridClientPartitionAffinity());
GridClientDataConfiguration replicated = new GridClientDataConfiguration();
replicated.setName(REPLICATED_CACHE_NAME);
GridClientDataConfiguration replicatedAsync = new GridClientDataConfiguration();
replicatedAsync.setName(REPLICATED_ASYNC_CACHE_NAME);
cfg.setDataConfigurations(Arrays.asList(loc, partitioned, replicated, replicatedAsync));
return cfg;
}
/**
* 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(">>>");
}
/** @throws Exception If failed. */
public void testClientAffinity() throws Exception {
GridClientData partitioned = client.data(PARTITIONED_CACHE_NAME);
Collection<Object> keys = new ArrayList<>();
keys.addAll(Arrays.asList(Boolean.TRUE, Boolean.FALSE, 1, Integer.MAX_VALUE));
Random rnd = new Random();
StringBuilder sb = new StringBuilder();
// Generate some random strings.
for (int i = 0; i < 100; i++) {
sb.setLength(0);
for (int j = 0; j < 255; j++)
// Only printable ASCII symbols for test.
sb.append((char) (rnd.nextInt(0x7f - 0x20) + 0x20));
keys.add(sb.toString());
}
// Generate some more keys to achieve better coverage.
for (int i = 0; i < 100; i++) keys.add(UUID.randomUUID());
for (Object key : keys) {
UUID nodeId = grid(0).mapKeyToNode(PARTITIONED_CACHE_NAME, key).id();
UUID clientNodeId = partitioned.affinity(key);
assertEquals(
"Invalid affinity mapping for REST response for key: " + key, nodeId, clientNodeId);
}
}
/**
* @param g Grid.
* @return Non-system caches.
*/
private Collection<GridCacheConfiguration> caches(Grid g) {
return F.view(
Arrays.asList(g.configuration().getCacheConfiguration()),
new GridPredicate<GridCacheConfiguration>() {
@Override
public boolean apply(GridCacheConfiguration c) {
return c.getName() == null || !c.getName().equals(CU.UTILITY_CACHE_NAME);
}
});
}
/**
* 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 example.
*
* @param args Command line arguments, none required.
* @throws GridException If example execution failed.
*/
public static void main(String[] args) throws GridException {
try (Grid g = GridGain.start("examples/config/example-compute.xml")) {
System.out.println();
System.out.println("Compute reducer example started.");
Integer sum =
g.compute()
.apply(
new GridClosure<String, Integer>() {
@Override
public Integer apply(String word) {
System.out.println();
System.out.println(">>> Printing '" + word + "' on this node from grid job.");
// Return number of letters in the word.
return word.length();
}
},
// Job parameters. GridGain will create as many jobs as there are parameters.
Arrays.asList("Count characters using reducer".split(" ")),
// Reducer to process results as they come.
new GridReducer<Integer, Integer>() {
private AtomicInteger sum = new AtomicInteger();
// Callback for every job result.
@Override
public boolean collect(Integer len) {
sum.addAndGet(len);
// Return true to continue waiting until all results are received.
return true;
}
// Reduce all results into one.
@Override
public Integer reduce() {
return sum.get();
}
})
.get();
System.out.println();
System.out.println(">>> Total number of characters in the phrase is '" + sum + "'.");
System.out.println(">>> Check all nodes for output (this node is also part of the grid).");
}
}
/**
* Constructs data loader peer-deploy aware.
*
* @param objs Collection of objects to detect deploy class and class loader.
*/
private DataLoaderPda(Object... objs) {
this.objs = Arrays.asList(objs);
}