/**
* Change topology.
*
* @param parent Grid to execute tasks on.
* @param add New nodes count.
* @param rmv Remove nodes count.
* @param type Type of nodes to manipulate.
*/
private static void changeTopology(Ignite parent, int add, int rmv, String type) {
Collection<ComputeTaskFuture<?>> tasks = new ArrayList<>();
IgniteCompute comp = parent.compute().withAsync();
// Start nodes in parallel.
while (add-- > 0) {
comp.execute(ClientStartNodeTask.class, type);
tasks.add(comp.future());
}
for (ComputeTaskFuture<?> task : tasks) task.get();
// Stop nodes in sequence.
while (rmv-- > 0) parent.compute().execute(ClientStopNodeTask.class, type);
// Wait for node stops.
// U.sleep(1000);
Collection<String> gridNames = new ArrayList<>();
for (Ignite g : G.allGrids()) gridNames.add(g.name());
parent.log().info(">>> Available grids: " + gridNames);
}
/**
* Example for start/stop node tasks.
*
* @param args Not used.
*/
public static void main(String[] args) {
String nodeType = "tcp+ssl";
// Start initial node = 1
try (Ignite g = G.start(NODE_CFG.get(nodeType))) {
// Change topology.
changeTopology(g, 4, 1, nodeType);
changeTopology(g, 1, 4, nodeType);
// Stop node by id = 0
g.compute().execute(ClientStopNodeTask.class, g.cluster().localNode().id().toString());
// Wait for node stops.
// U.sleep(1000);
assert G.allGrids().isEmpty();
} catch (Exception e) {
System.err.println("Uncaught exception: " + e.getMessage());
e.printStackTrace(System.err);
}
}
/**
* Executes {@link GridSegmentATask} and {@link GridSegmentBTask} tasks on the grid.
*
* @param args Command line arguments, none required or used.
* @throws GridException If example execution failed.
*/
public static void main(String[] args) throws GridException {
AbstractApplicationContext ctx =
new ClassPathXmlApplicationContext("org/gridgain/examples/multispi/master.xml");
// Get configuration from Spring.
GridConfiguration cfg = ctx.getBean("grid.cfg", GridConfiguration.class);
G.start(cfg);
try {
Grid grid = G.grid();
// Execute task on segment "A".
GridTaskFuture<Integer> futA = grid.execute(GridSegmentATask.class, null);
// Execute task on segment "B".
GridTaskFuture<Integer> futB = grid.execute(GridSegmentBTask.class, null);
// Wait for task completion.
futA.get();
futB.get();
X.println(">>>");
X.println(">>> Finished executing Grid \"Multiple Topology\" example with custom tasks.");
X.println(
">>> You should see print out of 'Executing job on node that is from segment A.'"
+ "on node that has attribute \"segment=A\"");
X.println(
">>> and 'Executing job on node that is from segment B.' on node that has "
+ "attribute \"segment=B\"");
X.println(">>> Check all nodes for output (this node is not a part of the grid).");
X.println(">>>");
} finally {
G.stop(true);
}
}
/**
* Starts new grid node.
*
* @param gridName name of new node.
* @param springCfg file with spring configuration to use for this node.
* @return a grid instance local to new node {@link GridGain#start(GridConfiguration)}.
* @throws Exception if node run failed.
*/
protected Grid startNode(String gridName, File springCfg) throws Exception {
assert springCfg != null;
ListableBeanFactory springCtx =
new FileSystemXmlApplicationContext("file:///" + springCfg.getAbsolutePath());
Map cfgMap = springCtx.getBeansOfType(GridConfiguration.class);
assert cfgMap != null;
assert !cfgMap.isEmpty();
GridConfiguration cfg = (GridConfiguration) cfgMap.values().iterator().next();
cfg.setGridName(gridName + "-" + getNextNodeNum());
return G.start(cfg);
}
/** {@inheritDoc} */
@Override
protected Object executeJob(int gridSize, String type) {
log.info(">>> Starting new grid node [currGridSize=" + gridSize + ", arg=" + type + "]");
if (type == null) throw new IllegalArgumentException("Node type to start should be specified.");
IgniteConfiguration cfg = getConfig(type);
// Generate unique for this VM grid name.
String gridName = cfg.getGridName() + " (" + UUID.randomUUID() + ")";
// Update grid name (required to be unique).
cfg.setGridName(gridName);
// Start new node in current VM.
Ignite g = G.start(cfg);
log.info(
">>> Grid started [nodeId=" + g.cluster().localNode().id() + ", name='" + g.name() + "']");
return true;
}
/**
* See <a href="http://e-docs.bea.com/wls/docs100/javadocs/weblogic/common/T3StartupDef.html">
* http://e-docs.bea.com/wls/docs100/javadocs/weblogic/common/T3StartupDef.html</a> for more
* information.
*
* @param str Virtual name by which the class is registered as a {@code startupClass} in the
* {@code config.xml} file
* @param params A hashtable that is made up of the name-value pairs supplied from the {@code
* startupArgs} property
* @return Result string (log message).
* @throws Exception Thrown if error occurred.
*/
@SuppressWarnings({"unchecked", "CatchGenericClass"})
@Override
public String startup(String str, Hashtable params) throws Exception {
GridLogger log = new GridJavaLogger(LoggingHelper.getServerLogger());
cfgFile = (String) params.get(cfgFilePathParam);
if (cfgFile == null) {
throw new IllegalArgumentException("Failed to read property: " + cfgFilePathParam);
}
String workMgrName = (String) params.get(workMgrParam);
URL cfgUrl = U.resolveGridGainUrl(cfgFile);
if (cfgUrl == null)
throw new ServerLifecycleException(
"Failed to find Spring configuration file (path provided should be "
+ "either absolute, relative to GRIDGAIN_HOME, or relative to META-INF folder): "
+ cfgFile);
GenericApplicationContext springCtx;
try {
springCtx = new GenericApplicationContext();
XmlBeanDefinitionReader xmlReader = new XmlBeanDefinitionReader(springCtx);
xmlReader.loadBeanDefinitions(new UrlResource(cfgUrl));
springCtx.refresh();
} catch (BeansException e) {
throw new ServerLifecycleException(
"Failed to instantiate Spring XML application context: " + e.getMessage(), e);
}
Map cfgMap;
try {
// Note: Spring is not generics-friendly.
cfgMap = springCtx.getBeansOfType(GridConfiguration.class);
} catch (BeansException e) {
throw new ServerLifecycleException(
"Failed to instantiate bean [type="
+ GridConfiguration.class
+ ", err="
+ e.getMessage()
+ ']',
e);
}
if (cfgMap == null)
throw new ServerLifecycleException(
"Failed to find a single grid factory configuration in: " + cfgUrl);
if (cfgMap.isEmpty())
throw new ServerLifecycleException("Can't find grid factory configuration in: " + cfgUrl);
try {
ExecutorService execSvc = null;
MBeanServer mbeanSrv = null;
for (GridConfiguration cfg : (Collection<GridConfiguration>) cfgMap.values()) {
assert cfg != null;
GridConfigurationAdapter adapter = new GridConfigurationAdapter(cfg);
// Set logger.
if (cfg.getGridLogger() == null) adapter.setGridLogger(log);
if (cfg.getExecutorService() == null) {
if (execSvc == null)
execSvc =
workMgrName != null
? new GridThreadWorkManagerExecutor(workMgrName)
: new GridThreadWorkManagerExecutor(J2EEWorkManager.getDefault());
adapter.setExecutorService(execSvc);
}
if (cfg.getMBeanServer() == null) {
if (mbeanSrv == null) {
InitialContext ctx = null;
try {
ctx = new InitialContext();
mbeanSrv = (MBeanServer) ctx.lookup("java:comp/jmx/runtime");
} catch (Exception e) {
throw new IllegalArgumentException(
"MBean server was not provided and failed to obtain " + "Weblogic MBean server.",
e);
} finally {
if (ctx != null) ctx.close();
}
}
adapter.setMBeanServer(mbeanSrv);
}
Grid grid = G.start(adapter, springCtx);
// Test if grid is not null - started properly.
if (grid != null) gridNames.add(grid.name());
}
return getClass().getSimpleName() + " started successfully.";
} catch (GridException e) {
// Stop started grids only.
for (String name : gridNames) G.stop(name, true);
throw new ServerLifecycleException("Failed to start GridGain.", e);
}
}