Sharing a java virtual machine

2:

• The method according to claim 1, further comprising:
• allocating, by the computer system, through a virtualization technology application programming interface for the virtual machine, the plurality of IP addresses among the plurality of tenants through a DHCP protocol;
• creating, by the computer system, through the virtualization technology application programming interface, a separate virtual network interface for each of the plurality of tenants from among a plurality of virtual network interfaces;
• configuring, by the computer system, through the virtualization technology application programming interface, each separate virtual network interface for each separate tenant with the separate IP address allocated for the separate tenant;
• and
• performing, by the computer system, network operations for each separate tenant via the separate virtual network interface for each separate tenant, wherein the machine intercepts the network operations, identifies the tenant context identifying each separate tenant for each separate network operation, and transparently redirects network operations for each separate tenant to the separate virtual network interface for each separate tenant.

8:

• A system, comprising:
• at least one processor coupled to a memory and operative, in response to receiving an accept operation call for a particular tenant of a plurality of tenants, to trigger an accept wrapper by a virtual machine shared by a plurality of tenants, each of the plurality of tenants allocated a separate IP address from among a plurality of IP addresses, each of the plurality of tenants sharing a localhost port, the accept wrapper for supporting network isolation for the plurality of tenants;
• and
• the at least one processor, in response to determining the accept operation relates to an IP address bound to a particular address call binding the particular tenant to a particular IP address from among the plurality of IP addresses and to the localhost port:
• operative to create a first socket to listen to a particular IP address assigned to the particular tenant;
• operative to create a second socket to listen to another port;
• operative, in response to a connection occurring on the first socket, to create a first thread and forward the first thread to the accept wrapper from the particular IP address;
• operative, in response to the connection occurring on the second socket, to create a second thread and forward the second thread to the accept wrapper from the another port;
• and
• operative to return at least one of the first thread and the second thread in response to the accept operation call.

9:

• The system according to claim 8, further comprising:
• the at least one processor operative to allocate, through a virtualization technology application programming interface for the virtual machine, the plurality of IP addresses among the plurality of tenants through a DHCP protocol;
• the at least one processor operative to create, through the virtualization technology application programming interface, a separate virtual network interface for each of the plurality of tenants from among a plurality of virtual network interfaces;
• the at least one processor operative to configure, through the virtualization technology application programming interface, each separate virtual network interface for each separate tenant with the separate IP address allocated for the separate tenant;
• and
• the at least one processor operative to perform network operations for each separate tenant via the separate virtual network interface for each separate tenant, wherein the virtual machine intercepts the network operations, identifies the tenant context identifying each separate tenant for each separate network operation, and transparently redirects network operations for each separate tenant to the separate virtual network interface for each separate tenant.

15:

• A computer program product comprising a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to:
• in response to receiving an accept operation call for a particular tenant of a plurality of tenants, triggering, by a computer system, an accept wrapper by a virtual machine shared by a plurality of tenants, each of the plurality of tenants allocated a separate IP address from among a plurality of IP addresses, each of the plurality of tenants sharing a localhost port, the accept wrapper for supporting network isolation for the plurality of tenants;
• and
• in response to determining the accept operation relates to an IP address bound to a particular address call binding the particular tenant to a particular IP address from among the plurality of IP addresses and to the localhost port:
• creating, by the computer system, a first socket to listen to a particular IP address assigned to the particular tenant;
• creating, by the computer system, a second socket to listen to another port;
• in response to a connection occurring on the first socket, creating, by the computer system, a first thread and forwarding the first thread to the accept wrapper from the particular IP address;
• in response to the connection occurring on the second socket, creating, by the computer system, a second thread and forwarding the second thread to the accept wrapper from the another port;
• and
• returning, by the computer system, at least one of the first thread and the second thread in response to the accept operation call.

16:

• The computer program product according to claim 15, further comprising program instructions executable by the computer to cause the computer to:
• allocate, by the computer, through a virtualization technology application programming interface for the virtual machine, the plurality of IP addresses among the plurality of tenants through a DHCP protocol;
• create, by the computer, through the virtualization technology application programming interface, a separate virtual network interface for each of the plurality of tenants from among a plurality of virtual network interfaces;
• configure, by the computer, through the virtualization technology application programming interface, each separate virtual network interface for each separate tenant with the separate IP address allocated for the separate tenant;
• and
• perform, by the computer, network operations for each separate tenant via the separate virtual network interface for each separate tenant, wherein the virtual machine intercepts the network operations, identifies the tenant context identifying each separate tenant for each separate network operation, and transparently redirects network operations for each separate tenant to the separate virtual network interface for each separate tenant.