public void filter() throws IOException {
// START SNIPPET: filter
File source = new File("source.txt");
File destination = new File("destination.txt");
Inputs.text(source).transferTo(Outputs.text(destination));
// END SNIPPET: filter
}
public void init(
@Service @IdentifiedBy("testds") DataSource dataSource,
@Service @IdentifiedBy("testds2") ServiceReference<DataSource> dataSource2)
throws SQLException, PropertyVetoException {
Databases databases = new Databases(dataSource);
// Insert some data and print it out
databases.update("insert into test values ('id1','foo')");
databases
.query("select * from test")
.transferTo(
Outputs.withReceiver(
new Receiver<ResultSet, SQLException>() {
@Override
public void receive(ResultSet item) throws SQLException {
System.out.println(item.getString("id"));
}
}));
Databases databases2 = new Databases(dataSource2.get());
// Insert some data and print it out
databases2.update("insert into test values ('id2','bar')");
databases2
.query("select * from test")
.transferTo(
Outputs.withReceiver(
new Receiver<ResultSet, SQLException>() {
@Override
public void receive(ResultSet item) throws SQLException {
System.out.println(item.getString("id"));
}
}));
// Trip the CB
dataSource2.metaInfo(CircuitBreaker.class).trip();
// This should now fail
try {
databases2
.query("select * from test")
.transferTo(
Outputs.withReceiver(
new Receiver<ResultSet, SQLException>() {
@Override
public void receive(ResultSet item) throws SQLException {
System.out.println(item.getString("id"));
}
}));
Assert.fail();
} catch (Throwable e) {
// Correct
}
// Turn the CB back on
dataSource2.metaInfo(CircuitBreaker.class).turnOn();
// This should now work
databases2
.query("select * from test")
.transferTo(
Outputs.withReceiver(
new Receiver<ResultSet, SQLException>() {
@Override
public void receive(ResultSet item) throws SQLException {
System.out.println(item.getString("id"));
}
}));
}