/**
* Updates or adds an agent to the database.
*
* @param agent The Agent you wish to modify or add in the database.
*/
protected void updateAgentInDatabase(AgentImpl agent) {
EntityManager em = null;
EntityTransaction tx = null;
try {
em = emf.createEntityManager();
tx = em.getTransaction();
tx.begin();
AgentImpl existing = getAgent(agent.getName(), agent.getOrganization(), em);
if (existing == null) {
em.persist(agent);
} else {
existing.setConfiguration(agent.getConfiguration());
existing.setLastHeardFrom(agent.getLastHeardFrom());
existing.setState(agent.getState());
existing.setSchedulerRoles(agent.getSchedulerRoles());
existing.setUrl(agent.getUrl());
em.merge(existing);
}
tx.commit();
} catch (RollbackException e) {
logger.warn("Unable to commit to DB in updateAgent.");
throw e;
} finally {
if (em != null) em.close();
}
}
/**
* {@inheritDoc}
*
* @see
* org.opencastproject.capture.admin.api.CaptureAgentStateService#setAgentState(java.lang.String,
* java.lang.String)
*/
public int setAgentState(String agentName, String state) {
// Checks the state is not null nor empty
if (StringUtils.isBlank(state)) {
logger.debug("Unable to set agent state, state is blank or null.");
return BAD_PARAMETER;
} else if (StringUtils.isBlank(agentName)) {
logger.debug("Unable to set agent state, agent name is blank or null.");
return BAD_PARAMETER;
} else if (!KNOWN_STATES.contains(state)) {
logger.warn("can not set agent to an invalid state: ", state);
return BAD_PARAMETER;
} else {
logger.debug("Agent '{}' state set to '{}'", agentName, state);
}
AgentImpl agent = getAgent(agentName);
if (agent == null) {
// If the agent doesn't exists, but the name is not null nor empty, create a new one.
logger.debug("Creating Agent {} with state {}.", agentName, state);
Organization org = securityService.getOrganization();
AgentImpl a = new AgentImpl(agentName, org.getId(), state, "", new Properties());
updateAgentInDatabase(a);
} else if (!agent.getState().equals(state)) {
// the agent is known, so set the state
logger.debug("Setting Agent {} to state {}.", agentName, state);
agent.setState(state);
updateAgentInDatabase(agent);
}
return OK;
}
