Java ESL program for connecting to the FreeSWITCH
Next simple Java program using Event Socket interface to control FreeSWITCH.
First you should read:
Next you should not forget to change
<configuration name="event_socket.conf" description="Socket Client">
<settings>
<!-- Allow socket connections from any host -->
<param name="listen-ip" value="0.0.0.0"/>
<param name="listen-port" value="8021"/>
<param name="password" value="ClueCon"/>
</settings>
</configuration>
Now we can write simple java ESL program for connecting to the FreeSWITCH.
MyEslEventListener.java
event_socket.conf.xml (to allow connections from any host on the network):
MyEslEventListener.java
package myeslevent;
import java.util.Map;
import java.util.Set;
import org.freeswitch.esl.client.IEslEventListener;
import org.freeswitch.esl.client.transport.event.EslEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MyEslEventListener implements IEslEventListener {
private final Logger log = LoggerFactory.getLogger(this.getClass());
@Override
public void eventReceived(EslEvent event) {
log.info("eventReceived [{}]\n[{}]\n", event, getEventToLog(event));
}
@Override
public void backgroundJobResultReceived(EslEvent event) {
log.info("backgroundJobResultReceived [{}]\n[{}]\n", event, getEventToLog(event));
}
private String getEventToLog(EslEvent event) {
StringBuffer buf = new StringBuffer();
Map map = event.getEventHeaders();
Set set = map.keySet();
for (String name : set) {
buf.append(name + " " + map.get(name) + "\n");
}
return buf.toString();
}
}
MyEslEventTest.java
package myeslevent;
import java.util.Scanner;
import org.freeswitch.esl.client.inbound.Client;
import org.freeswitch.esl.client.inbound.InboundConnectionFailure;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MyEslEventTest {
private static final Logger log = LoggerFactory.getLogger(MyEslEventTest.class);
public static void main(String[] args) throws InterruptedException, InboundConnectionFailure {
System.out.println("--- hello freeswitch (terminate program to finish) ---\n");
Thread.sleep(2000);
log.info("--- connect client ---");
Client client = new Client();
client.addEventListener(new MyEslEventListener());
client.connect("fshost", 8021, "ClueCon", 1);
log.info("--- event subscription ---");
Thread.sleep(3000);
client.setEventSubscriptions("plain", "all");
log.info("--- call 1000 1001 ---");
client.sendSyncApiCommand("originate", "user/1000 1001");
new Scanner(System.in).nextLine();
client.close();
System.out.println("\n--- Bye freeswitch ---");
}
}
When we run this program we can see on the console much more than below:
--- hello freeswitch (terminate program to finish) --- --- connect client --- Received message: [EslMessage: contentType=[auth/request] headers=1, body=0 lines.] Received message: [EslMessage: contentType=[command/reply] headers=2, body=0 lines.] --- event subscription --- Received message: [EslMessage: contentType=[command/reply] headers=2, body=0 lines.] --- call 1000 1001 --- Received message: [EslMessage: contentType=[api/response] headers=2, body=1 lines.] eventReceived [EslEvent: name=[API] headers=2, eventHeaders=16, eventBody=0 lines.] [ Event-Name API Event-Calling-Function switch_api_execute API-Command sofia_contact Event-Date-Timestamp 1385849755755588 API-Command-Argument */1000@[?].[?].[?].[?] ] eventReceived [EslEvent: name=[CHANNEL_OUTGOING] headers=2, eventHeaders=49, eventBody=0 lines.] [ Caller-Source src/switch_ivr_originate.c Event-Calling-Function switch_core_session_outgoing_channel Answer-State ringing Caller-Orig-Caller-ID-Number 0000000000 Channel-Name sofia/internal/sip:1000@[?].[?].[?].[?]:24878 ... ] 9302 [EslEventNotifier-1] INFO myeslevent.MyEslEventListener - eventReceived [EslEvent: name=[CHANNEL_STATE]] [ ... ] eventReceived [EslEvent: name=[CHANNEL_CREATE] headers=2, eventHeaders=76, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_ORIGINATE] headers=2, eventHeaders=76, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[PRESENCE_IN] headers=2, eventHeaders=63, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_STATE] headers=2, eventHeaders=50, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_CALLSTATE] headers=2, eventHeaders=53, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_STATE] headers=2, eventHeaders=50, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CODEC] headers=2, eventHeaders=60, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CODEC] headers=2, eventHeaders=58, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_PROGRESS] headers=2, eventHeaders=102, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_ANSWER] headers=2, eventHeaders=124, eventBody=0 lines.] [ ... ] 9320 [EslEventNotifier-1] INFO myeslevent.MyEslEventListener - eventReceived [EslEvent: name=[CHANNEL_OUTGOING]] [ ... ] eventReceived [EslEvent: name=[MESSAGE_QUERY] headers=2, eventHeaders=17, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[PRESENCE_IN] headers=2, eventHeaders=70, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_STATE] headers=2, eventHeaders=59, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_EXECUTE_COMPLETE] headers=2, eventHeaders=154, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[CHANNEL_EXECUTE] headers=2, eventHeaders=153, eventBody=0 lines.] [ ... ] ... eventReceived [EslEvent: name=[HEARTBEAT] headers=2, eventHeaders=27, eventBody=0 lines.] [ ... ] eventReceived [EslEvent: name=[RE_SCHEDULE] headers=2, eventHeaders=18, eventBody=0 lines.] [ ... ] ]]>Good start to do something cool :)
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